Z80181 Datasheet, PDF (64/74 Pages) Zilog, Inc. – SMART ACCESS CONTROLLER (SAC™)

Zilog
AC CHARACTERISTICS (Continued)
SCC General Timing
Z80181
SMART ACCESS CONTROLLER SAC^™
Table D. SCC General Timing Parameters
No Symbol
Parameter
Z8018110
Min
Max
1
TdPC(REQ)
2
TdPC(W)
3
TsRXD(RXCr)
4
ThRXD(RXCr)
Clock Fall to /W//REQ Valid
Clock Fall to Wait Inactive
RxD to /RxC Rise Setup Time
RxD to /RxC Rise Hold Time
200
300
0
125
5
TsRXD(RXCf)
6
ThRXD(RXCf)
7
TsSY(RXC)
8
ThSY(RXC)
RxD to /RxC Fall Setup Time
RxD to /RxC Fall Hold Time
/SYNC to /RxC Setup Time
/SYNC to /RxC Hold Time
0
125
–150
5TcC
9
TdTXCf(TXD)
10 TdTXCr(TXD)
11 TdTXD(TRX)
12 TwRTXh
13 TwRTXl
/TxC Fall to TxD Delay
/TxC Rise to TxD Delay
TxD to /TRxC Delay
/RTxC High Width
/RTxC Low Width
150
150
140
120
120
14 TcRTX
15 TcRTXX
16 TwTRXh
17 TwTRXl
/RTxC Cycle Time (RxD, TxD)
Xtal OSC Period
/TRxC High Width
/TRxC Low Width
400
100
1000
120
120
18 TcTRX
/TRxC Cycle Time
400
19 TwEXT
/DCD or /CTS Pulse Width
120
20 TwSY
/SYNC Pulse Width
100
21 TxRx(DPLL)
DPLL Cycle Time
50
Notes to Table D:
[D1] /RXC is /RTxC or /TRxC, whichever is supplying the receiver clock.
[D2] /TXC is /TRxC or /RTxC, whichever is supplying the transmitter clock.
[D3] Both /RTxC and /SYNC pins have 30 pF Capacitors (to Ground).
[D4] Parameter applies only to FM encoding/decoding.
[D5] Parameter applies only to transmitter and receiver; baud rate generator timing requirements are different.
[D6] The maximum receive or transmit data rate is 1/4 TcC.
[D7] Applies to DPLL clock source only; maximum data rate of 1/4 TcC still applies.
Unit
Note
ns
ns
ns
[D1]
ns
[D1]
ns
[D1,4]
ns
[D1,4]
ns
[D1]
ns
[D1]
ns
[D2]
ns
[D2,4]
ns
ns
[D5]
ns
[D5]
ns
[D5,6]
ns
[D3]
ns
[D5]
ns
[D5]
ns
[D5,7]
ns
ns
ns
[D6,7]
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