Z80185 Datasheet, PDF (21/95 Pages) Zilog, Inc. – SMART PERIPHERAL CONTROLLERS

Zilog
PRELIMINARY
Z80185/Z80195
SMART PERIPHERAL CONTROLLES
AC CHARACTERISTICS (Continued)
EMSCC System Timing
No.
Symbol
Parameter
20 MHz
Min
Max
Notes
2
TdRxC(W)
4
TdRxC(INT)
/RxC to /Wait Inactive
/RxC to /INT Valid
13
18
15
22
[1,2]
[1,2]
6
TdTxC(W)
8
TdTxC(INT)
10
TdExT(INT)
/TxC to /Wait Inactive
/TxC to /INT Valid
/DCD or /CTS to /INT Valid
8
17
[1,3]
9
17
[1,3]
3
9
[1]
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 equal to TcPc
These AC parameter values are preliminary and subject to change
without notice.
Valid ESCC
Addr * IORQ
1
/RD or
/WR
Figure 19. EMSCC External Bus Master Timing
External Bus Master Interface Timing (SCC Related Timing)
No Symbol
Parameter
Z80185 / Z80195
(20 MHz)
Min Max
1 TrC
Valid Access Recovery Time
4TcC
Z80185 / Z80195
(33 MHz)
Min Max
4TcC
Unit Notes
ns [1]
Notes:
[1] Applies only between transactions involving the EMSCC.
These AC parameter values are preliminary and subject to change
without notice.
T_CC = EMSCC Clock Period Time
DS971850301
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