CHAPTER 4 INTERFACES
PRELIMINARY
NEC confidential and Proprietary
140
4.4.1 OH Insert Interface
TOH / POH is input in sync with a 19.44-MHz clock as 2-bit parallel data.
Figure 4-21. TOH and POH Insert Interfaces
1 Frame
Row9
2 Frame
Row1
2 Frame
Row2
19.44MHz
1st A1
2nd A1
Z0
J1
B1
4
TOH
144 Clock (36
×
4)
POH
4 Clock
IDLE
122 Clock
270 Clock
4
4
4
TOHCK(
O)
TTOHFP(
O)
TPOHFP(
O)
TOHD[0](
I)
TOHD[1](
I)
TOHAV(
I)
Bit1 Bit3 Bit5 Bit7
Bit2 Bit4 Bit6 Bit8
Bit1 Bit3 Bit5 Bit7
Bit2 Bit4 Bit6 Bit8
Bit1 Bit3 Bit5 Bit7
Bit2 Bit4 Bit6 Bit8
Bit1 Bit3 Bit5 Bit7
Bit2 Bit4 Bit6 Bit8
Bit1 Bit3 Bit5 Bit7
Bit2 Bit4 Bit6 Bit8
Don’t care
peripheral device
sampling
uPD98413
sampling
Summary of Contents for NEASCOT-P65
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