PCI-SIO4 User Manual
General Standards Corporation
8302A Whitesburg Drive Huntsville, AL 35802, Phone: (256) 880-8787
26
2.3.7.1
Low: (LOC: 0xnC)
D0..D7
RW
Test Data 7..0
2.3.7.2
High: (LOC 0xn1A)
D0..D7
RW
Test Data 7..0
2.3.8
T
EST
M
ODE
C
ONTROL
R
EGISTER
(TMCR)
2.3.8.1
Low: (LOC 0xnE)
D0..4
Test Register Address (encoded as follows):
00000
Null Address
00001
High Byte of Shifters
00010
CRC Byte 0
00011
CRC Byte 1
00100
Rx FIFO (Write)
00101
Clock Multiplexer Outputs
00110
CTR0 and CTR1 Counters
00111
Clock Multiplexer Inputs
01000
DPLL State
01001
Low Byte of Shifters
01010
CRC Byte 2
01011
CRC Byte 3
01100
Tx FIFO (Read)
01101
Reserved
01110
I/O and Device Status Latches
01111
Internal Daisy Chain
10000
Reserved
10001
Reserved
10010
Reserved
10011
Reserved
10100
Reserved
10101
Reserved
10110
Reserved
10111
Reserved
11000
4044H
11001
4044H
11010
4044H
11011
4044H
11100
4044H
11101
4044H
11110
4044H
11111
4044H
D5..7
RW
Reserved
2.3.8.2
High: (LOC 0xn0F)
D0..7
RW
Reserved