Z8523016VEG Datasheet, PDF (103/118 Pages) Zilog, Inc. – Enhanced Serial Communications Controller

Z80230/Z85230/L
Product Specification
98
Table 49. Z85230/L System Timing Characteristics (20MHz applies only to Z85230)
8.5 MHz
10 MHz
16 MHz
20 MHZ
No Symbol
Parameter
Min Max Min Max Min Max Min Max Notes
1 TdRXC
(REQ)
RxC to W/REQ 13 17 13 17 13 17 13 18 2, 4
Valid
2 TdRXC (W) RxC to Wait
Inactive
13 17 13 17 13 17 13 18 1, 2, 4
3 TdRXC (SY) RxC to SYNC
4
7
47
47
48
2, 4
Valid²
4 TdRXC (INT) RxC to INT Valid 15 21 15 21 15 21 15 22 1, 2, 4
5 TdTXC
(REQ)
TxC to W/REQ 8
Valid
6 TdTXC (W) TxC to Wait
8
Inactive
7 TdTXC
(DRQ)
TxC to DTR/REQ 7
Valid
13 8
14 8
10 7
13 8
14 8
10 7
13 8
14 8
10 7
12 3, 4
15 1, 3, 4
11 3, 4
8 TdTXC (INT) TxC to INT Valid 7
9 TsSY (INT) SYNC to INT Valid 2
13 7
7
2
13 7
7
2
13 7
7
2
14 1, 3, 4
7
1, 4
10 TdEXT (INT) DCD or CTS to 3
8
38
38
39
1, 4
INT Valid
Notes:
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 in TcPc.
PS005308-0609
Electrical Characteristics