Oh Insert Interface - NEC UPD98413 User Manual

4.4.1 OH Insert Interface

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