Z80230 Datasheet, PDF (12/12 Pages) Zilog, Inc. – ESCC™ ENHANCED SERIAL COMMUNICATION CONTROLLER

AC CHARACTERISTICS
Z80230 System Timing Table
No Symbol
1 TdRXC(REQ)
2 TdRXC(W)
3 TdRdXC(SY)
4b TdRXC(INT), Z80230
5 TdTXC(REQ)
6 TdTXC(W)
7 TdTXC(DRQ)
8b TdTXC(INT), Z80230
Parameter
/RxC High to W/REQ Valid
/RxC High to Wait Inactive
/RxC High to SYNC Valid
/RxC High to INT Valid
/TxC Low to W/REQ Valid
/TxC Low to Wait Inactive
/Txc Low to DTR/REQ Valid
/TxC Low to /INT Valid
9 TdSY(INT)
SYNC to INT Valid
10b TdEXT(INT), Z80230
Notes:
* Units equal to TcPc.
[1] Open drain-output, measured with open-drain test load.
[2] /RxC is /RTxC or /TRxC, whichever is supplying the receive clock.
[3] /TxC is /TRxC or /RTxC, whichever is supplying the transmit clock.
[4] Units equal to /AS.
10 MHz
Min Max
13 17
13 19
4
7
13 17
2
3
11 14
8
14
9
12
7
9
+2 +3
2
6
+2 +3
2
3
16 MHz
Min Max
13 17
13 19
4
7
13 17
+2 +3
11 14
8
14
9
12
7
9
+2 +3
2
6
+2 +3
3
8
Notes*
[2]
[1,2]
[2]
[1,2]
[4]
[3]
[1,3]
[3]
[1,3]
[4]
[1]
[4]
[1,4]
12