z85230 ZiLOG Semiconductor, z85230 Datasheet - Page 97

• Manufacturer Part Number: z85230
• Description: Enhanced Serial Communications Controller
• Manufacturer: ZiLOG Semiconductor

Table 46. Z85230 AC Characteristics (Continued)
PS005303-0907
No
49
Note:
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
5. Parameter applies to enhanced Request mode only (WR7’ bit 4=1)
6. Units in nanoseconds.
7. Units in TcPc.
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.
Symbol
Trc
Parameter
Valid Access
Recovery Time
Min
4
8.5 MHz
Max
4
Min
10 MHz
Max
4
Min
16 MHz
Max
Product Specification
Electrical Characteristics
Min
4
20 MHz
Z85230/Z80230
Max
Notes
2, 7
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