STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
433
TDO. During the Capture-DR state, the device identification code is loaded into
the boundary scan register. The code can then be shifted out TDO using the
Shift-DR state.
Boundary Scan Register
The boundary scan register is made up of 59 boundary scan cells, divided into
input observation (in_cell), output (out_cell), and bidirectional (io_cell) cells.
These cells are detailed in the pages which follow. The first 32 cells (58 down to
27) form the ID code register, and carry the code 443510CD for revision E
COMET devices and 543510CD for revision F COMET devices. The remaining
cells also have values which may be captured during the idcode instruction and
shifted out if desired; these are included in brackets for reference. The cells are
arranged as follows:
Table 114
- Boundary Scan Register
Pin/ Enable
Register
Bit
Cell Type
I.D Bit.
Pin/ Enable
Register
Bit
Cell Type
I.D. Bit
HIZ3,4
58
OUT_CELL
0
5
D6_OEB
1
28
OUT_CELL
0
XCLK
57
IN_CELL
1
5
D7
27
IO_CELL
1
TCLKI
56
IN_CELL
0
5
D7_OEB
1
26
OUT_CELL
(0)
TCLKO
55
OUT_CELL
0
5
A0
25
IN_CELL
(0)
TDAT
54
OUT_CELL
0
A1
24
IN_CELL
(0)
TFP
53
OUT_CELL
1
A2
23
IN_CELL
(0)
BTCLK
52
IO_CELL
0
A3
22
IN_CELL
(0)
BTCLK_OEB
1
51
OUT_CELL
0
A4
21
IN_CELL
(0)
BTPCM
50
IN_CELL
0
A5
20
IN_CELL
(0)
BTSIG
49
IN_CELL
0
A6
19
IN_CELL
(0)
BTFP
48
IO_CELL
1
A7
18
IN_CELL
(0)
BTFP_OEB
1
47
OUT_CELL
1
A8
17
IN_CELL
(0)
CSB
46
IN_CELL
0
ALE
16
IN_CELL
(0)
RSTB
45
IN_CELL
1
BRFP
15
IO_CELL
(0)
RDB
44
IN_CELL
0
BRFP_OEB
1
14
OUT_CELL
(0)
WRB
43
IN_CELL
1
BRSIG
13
OUT_CELL
(0)
INTB
42
OUT_CELL
0
BRSIG_OEB
2
12
OUT_CELL
(0)
D0
41
IO_CELL
0
BRPCM
11
OUT_CELL
(0)
D0_OEB
1
40
OUT_CELL
0
BRPCM_OEB
2
10
OUT_CELL
(0)
D1
39
IO_CELL
1
BRCLK
9
IO_CELL
(0)