User guide

2: Software Development for the ICP
DC 900-1338I 43
In addition to the Motorola 6834x, the ICP2424 and ICP2432’s programmable devices
include:
• two, four, or eight Z16C32 integrated universal serial controllers (IUSCs) with
integral DMA for the ICP2432 or four IUSCs for the ICP2424
• Sipex’s SP502 (ICP2424) or SP504 (ICP2432) multi-mode serial transceivers
• a test mode register
• an LED register
Note
The 8-port ICP2432 only supports EIA-232.
2.5.1 Programming the 68340/68349
The ICP2424 does not use the 68040’s two-channel DMA controller. The ICP2432 uses
the 68349’s two-channel DMA controller for PCIbus transfers.
The 6834x’s serial port A is used as a console port. The SingleStep debugger uses vector
0x4c for serial port A interrupts. Serial port B’s control signals are used to control the
red and green LEDs on the mounting bracket. Ta bl e 2–3 contains the information
needed to turn the green and red LEDs on and off.
Table 2–3: LED Control Information
Address Value Operation
0xee00f71e 0x40 Green LED on
0xee00f71e 0x10 Red LED on
0xee00f71f 0x40 Green LED off
0xee00f71f 0x10 Red LED off
Both 2424
and 2432 have
red/green
LEDs.