Motorola MTR2000 T5544 Instruction / Field Service Manual page 225

Auxiliary I/O Board
Signal
Function
Name
MOSI Master Out/ Slave In
SPI _CLK SPI Bit Clock
OP1/2_CS1
SPI Select Line
(see Note 1)
Notes
8
Table 4. SPI Bus Output Circuitry Signals
Auxiliary I/O
Board
Connector P1
Pin A7
Pin C8
Pin A10
Note 1: OP1/2 represent two different signals routed to either:
- Option Slot 1 (P1/A10): that is, signal OP1_CS2,
or
- Option Slot 2 (which is also P1/A10): that is, signal OP2_CS2.
Description
serial SPI Latch Data
A low to high transition shifts serial
data bit in to the shift register
A high to low transition activates the
serial shift mode
Signal
Direction
Input
Input
Input
68P81096E53-C
09/30/05