Z8523016VEG Datasheet, PDF (98/118 Pages) Zilog, Inc. – Enhanced Serial Communications Controller

Z80230/Z85230/L
Product Specification
93
Table 47. Z85230/L AC Characteristics (20MHz applies only to Z85230) (Continued)
8.5 MHz
10 MHz
16 MHz
20 MHz
No Symbol
Parameter
Min Max Min Max Min Max Min Max Notes
49 Trc
Valid Access
4
4
4
4
2, 7
Recovery Time
Notes:
1. Parameter does not apply to Interrupt Acknowledge transactions.
2. Parameter applies only between transactions involving the ESCC.
3. Open-drain output, measured with open-drain test load.
4. Parameter is system-dependent. For any ESCC in the daisy chain, TdIAi (RD) must be greater than the sum of
TdPC (IEO) for the highest priority device in the daisy chain. TsIEI (RDA) for the ESCC and TdIEI (IEO) for each
device separating them in the daisy chain.
5. Parameter applies to enhanced Request mode only (WR7’ bit 4=1)
6. Units in ns.
7. Units in TcPc.
8. Applies to 8523L (3V version) only
PS005308-0609
Electrical Characteristics