
PRS28.4G
IBM Packet Routing Switch
I/O Definitions and Timing
Page 102 of 131
prs28.03.fm
August 31, 2000
Table 23: I/O Summary
(Page 1 of 3)
Pin Name
OCR/OCD/CIO
JTAG
Boundary Cell
IO Level
SYS_CLK_Q
SYS_CLK_QN
Differential OCR
Clock Tap
Cell
Diff.
HSTL
C_CLK_OUTQ
C_CLK_OUTQN
Differential OCD, always enabled
None
Diff.
HSTL
nRESET
OCR with Pull-Up
Boundary
TTL
SEQ_CLK
CIO, HSTL level, enable gated with OCM_OCD_ENABLE and
SEQ_CLK_OCD_ENABLE
Boundary
HSTL
SEQ_CLK_TTL
CIO, enable gated with OCM_OCD_ENABLE and
SEQ_CLK_OCD_ENABLE
Boundary
TTL
DATA_IN_(00:15)_Q(0:3)
DATA_IN_(00:15)_QN(0:3)
Differential OCR
Boundary
Diff.
HSTL
DATA_OUT_(00:15)_Q(0:3)
DATA_OUT_(00:15)_QN(0:3)
Differential OCD
Boundary
Diff.
HSTL
MEM_GRANT(0:3)
CIO, enable gated with OCM_OCD_ENABLE
Boundary
TTL
SND_GRANT(0:15)
OCR with Pull-Up
Boundary
TTL
RCV_GRANT(0:15)
OCR with Pull-Up
Boundary
TTL
Q_FULL(0:15)
CIO, enable gated with OCM_OCD_ENABLE
Boundary
TTL
Q_EMPTY(0:15)
CIO, enable gated with OCM_OCD_ENABLE
Boundary
TTL
Q_SYNC
CIO, enable gated with OCM_OCD_ENABLE
Boundary
TTL
MS_SYNC_IN
CIO, always disabled
Boundary
HSTL
MS_SYNC_OUT
CIO, enable gated with OCM_OCD_ENABLE and
MS_OCD_ENABLE
Boundary
HSTL
MS_DASLSYNC_IN(0:1)
CIO, always disabled
Boundary
HSTL
MS_DASLSYNC_OUT(0:1)
CIO, enable gated with OCM_OCD_ENABLE and
MS_OCD_ENABLE
Boundary
HSTL
MS_IN_ADDR(0:10)
CIO, enable gated with OCM_OCD_ENABLE and
MS_ADDR_OCD_ENABLE
Boundary
HSTL
MS_OUT_ADDR(0:10)
CIO, enable gated with OCM_OCD_ENABLE and
MS_ADDR_OCD_ENABLE
Boundary
HSTL
EMB_A_CLK
OCR with Pull-Down
Clock Tap
Cell
TTL
EMB_B_CLK
OCR with Pull-Down
Clock Tap
Cell
TTL
nEMB_SIGOUT
CIO, enable gated with OCM_OCD_ENABLE and INTERRUPT in
order to drive ‘0’.
Requires on card pull-up.
Boundary
TTL
nEMB_SELECT
OCR with Pull-Down
Boundary
TTL
EMB_MODE
OCR with Pull-Down
Boundary
TTL