Motorola MVME Series IPMC712/761 I/O Module

Motorola MVME Series IPMC712/761 I/O Module

Basic Information

The installation and user manual for the Motorola MVME series IPMC712/761 I/O module introduces two multifunctional I/O modules based on the PMC (PCI Mezzanine Card) specification. The core is positioned as an extension component for MVME5100, MVME5500, and MVME6100 single board computers (SBC), providing industrial grade I/O interfaces such as SCSI, serial, and parallel, suitable for industrial control, embedded computing, and other scenarios, especially supporting backward compatibility with the old MVME761/MVME712M modules.

Module core functions and model differences

（1） Core functional positioning

IPMC712 and IPMC761 are both single width standard PMC modules, with the core function of expanding the host's I/O interface capabilities to meet the connection requirements of multiple types of devices in industrial scenarios. The common functions include:

SCSI interface: Integrated LSI SYM53C895A controller, supports Ultra Wide SCSI (16 bit bus), synchronous transfer rate up to 40MB/s (16 bit mode), 20MB/s (8-bit mode), asynchronous transfer rate 5MB/s, suitable for industrial storage devices such as hard drives and optical drives;

Serial Communication: Equipped with Z85230 ESCC (Enhanced Serial Communication Controller) and PC97307 Super I/O chip, providing multi-channel serial ports, supporting asynchronous/synchronous modes, and adapting to serial devices such as modems and sensors;

Parallel port: Supports IEEE 1284 standard, 8-bit bidirectional communication, compatible with Centronics interface devices (such as industrial printers, data collectors);

PCI-ISA Bridge: The bridge between the PCI bus and ISA bus is achieved through the Winbond W83C554F chip, supporting ISA interrupt and DMA functions to ensure legacy device compatibility;

Data storage: Onboard 256 × 8 serial EEPROM (AT24C02), used to store Vital Product Data (VPD) and record module hardware configuration information.

（2） Core differences between IPMC712 and IPMC761

The two module architectures are consistent, with the main difference being the serial port configuration and physical interface design. The specific differences are as follows:

Comparison dimension IPMC712 IPMC761

Number of serial ports: 3 asynchronous ports+1 configurable (asynchronous/synchronous) port, 2 asynchronous ports+2 configurable (asynchronous/synchronous) ports

Serial clock configuration port 4 can be set with J2/J3/J5 jumper for transmitting and receiving clocks, supporting loop back (J5 jumper). Port 3/4 can only be set with J2/J3 jumper for transmitting and receiving clocks, without loop back function

Ethernet compatibility backboard Ethernet port unavailable (needs to be extended through P2 adapter) Support backboard Ethernet port routing (needs to be coordinated with MVME761 transition module)

Typical application scenarios focus on simple serial communication extensions, such as sensor data acquisition emphasizing multi serial device connections, such as industrial bus gateways and multi node communication

Hardware architecture and key components

（1） Hardware architecture diagram

The module is designed based on the architecture of "PCI bus → bridge chip → functional subsystem", and the core components include:

PCI interface layer: connected to the host PCI bus (32-bit, 33MHz) through P11-P15 connectors, supporting PCI bus arbitration and burst transmission to ensure data transmission efficiency;

Bridge layer: Winbond W83C554F (PIB, PCI-ISA bridge) implements protocol conversion between PCI and ISA bus, supports 8259 interrupt controller and ISA DMA channel;

Functional subsystem:

SCSI subsystem: LSI SYM53C895A controller+40MHz clock, supporting wide bus and high-speed transmission;

Serial subsystem: Z85230 ESCC (2-channel synchronous/asynchronous)+Z8536 CIO (supplementary modem control signal);

Parallel subsystem: PC97307 Super I/O chip, supporting IEEE 1284 mode;

Configuration and Storage: 2 user configurable switches (S1/GPIO configuration, S2/IDSEL selection), AT24C02 EEPROM (VPD storage).

（2） Key electrical parameters

Parameter category specification requirements

Supply voltage+5V (± 5%), ± 12V (± 10%); Typical power consumption:+5V/0.5A,+12V/0.2A, -12V/0.1A; Maximum power consumption:+12V/0.5A, -12V/0.3A

Working temperature 0~70 ℃ (PCB working temperature), storage temperature -40~85 ℃

Isolation and anti-interference support ESD protection (compliant with IEC 61000-4-2), surge protection (IEC 61000-4-5), PCI signal level 5V standard

Connectors P11~P15 (64 pin EIA-E700 connector), supporting PCI interface and I/O signal output

Hardware configuration and installation requirements

（1） Core configuration items

S1 switch (GPIO configuration): 1 × 4 switch, used to set SCSI speed and bus width:

S1-P1（GPIO2）：OFF=Ultra SCSI（20/40MB/s），ON=FAST SCSI（10/20MB/s）；

S1-P2 (GPO3): OFF=Wide SCSI (16 bits), ON=Narrow SCSI (8 bits);

S1-P3/P4: Not used (NC).

S2 switch (IDSEL selection): 1 × 2 switch, select the IDSEL signal connection of the PCI device according to the host model:

MVME5100/MVME5500: S2-P1=ON, S2-P2=OFF (connected to AD11);

MVME6100: S2-P1=OFF, S2-P2=ON (connected to AD16/AD21);

Prohibit simultaneous ON/OFF of two switches (to avoid abnormal device enumeration).

Jumper configuration:

IPMC712: J1 (reserved programming interface), J2/J3 (port 4 clock source), J5 (clock loop back);

IPMC761: J1 (reserved), J2/J3 (source of clock for port 3/4 transmission and reception).

（2） Installation specifications

Installation position: Only supports installation in PMC slot 1 of the host. Before installation, the filler plate of the host front board needs to be removed to ensure that the module front board is aligned with the host front board;

Static protection: An anti-static wristband must be worn, and the module should be stored in anti-static packaging to avoid touching the circuit board pins;

Mechanical fixation: Fix the module on the host bracket with 4 M2 screws, ensuring that connectors P11-P15 are fully engaged with the host socket;

EMI compliance: After installation, ensure that all panel openings of the host are covered by modules or filler boards to avoid electromagnetic interference leakage.

Programming and Compatibility

（1） Core points of programming

PCI device configuration:

The onboard PCI device includes a SCSI controller (vendor ID 0x1000, device ID 0x0012) and a PCI-ISA bridge (vendor ID 0x10A, device ID 0x0565), which require setting interrupt and DMA parameters through the PCI configuration space;

IDSEL address mapping: Ensure device enumeration uniqueness based on the host model corresponding to AD11 (MVME5100/5500) and AD16/AD21 (MVME6100).

Interrupt and DMA configuration:

Interrupt routing: SCSI interrupts (IRQ14) and serial/parallel interrupts (IRQ3/4/7/9/10) are bridged to the host MPIC (Multiprocessor Interrupt Controller) through PIB, with different interrupt pin assignments for different hosts (such as IRQ0/9 for MVME5100 and MPP5/16 for MVME6100);

DMA channels: Supports 7 ISA DMA channels, with channels 0/1/5/6 for serial port transmission and reception, channels 2/3 for parallel ports, and channel 4 for internal cascading.

VPD access: Access the onboard EEPROM (address 0xA4) through the I ² C bus to read configuration information such as module model and hardware version. The host needs to access it through the I ² C controllers of Hawk (MVME5100), GT-64260 (MVME5500), and MV64360 (MVME6100).

（2） System compatibility

Adaptation host: Only supports MVME5100, MVME5500, and MVME6100 single board computers, and S2 switch and interrupt mapping need to be configured according to the host model;

Backward compatibility: Supports replacing old MVME761/MVME712M modules and achieving I/O signal compatibility through P2 transition cables, but attention should be paid to some PMC I/O routing restrictions (such as IPMC712 not supporting backplane Ethernet);

Software support: Compatible with Motorola PowerPlus II architecture programming specifications, requiring the use of firmware tools such as MOTLoad and PPCBug for configuration and debugging.

Environmental adaptability and compliance certification

（1） Environmental parameters

Environmental category specification requirements

Temperature operation: 0~70 ℃ (compliant with IEC 60068-2-1/2); Storage: -40~85 ℃ (compliant with MIL-STD-810G)

Humidity 20%~95% (40 ℃ without condensation, in accordance with IEC 60068-2-78)

Vibration and shock operation vibration: 5~60Hz (0.137mm), 60~150Hz (1.0G, in accordance with IEC 60068-2-6); Storage impact: 15G (11ms, compliant with IEC 60068-2-27)

The protection level module body is IP20 (compliant with IEC 60529) and needs to be installed in control cabinets with a protection level of IP54 or higher

（2） Compliance certification

Electromagnetic compatibility (EMC): compliant with EN 55022 Class B, EN 61000-6-2/4, resistant to ESD (± 8kV air discharge), surge (± 2kV communication port);

Safety certification: CSA ordinary area certification, Class I Division 2 Groups A-D hazardous area (non flammable);

Environmental Compliance: Compliant with RoHS Directive (Restriction of Hazardous Substances) and WEEE Directive (Electronic Waste Recycling).

Precautions for use

SCSI signal conflict: When installing other modules in host PMC slot 2, it is important to note that there may be conflicts with the SCSI signal (P15 connector), and the redundant signal should be disconnected through a 0 Ω resistor (R92-R100);

Clock configuration: The serial port clock source needs to be strictly matched through jumper wires (such as distinguishing between "module driver" or "external input" for IPMC712 port 4 clock) to avoid communication abnormalities;

Firmware and documentation: The module needs to be used in conjunction with the host firmware (such as the Hawk ASIC firmware of MVME5100). It is recommended to refer to the host manual to confirm the details of interrupt and DMA configuration.