Z80181 Zilog., Z80181 Datasheet - Page 64

• Manufacturer Part Number: Z80181
• Description: SMART ACCESS CONTROLLER (SAC)
• Manufacturer: Zilog.

Zilog
AC CHARACTERISTICS (Continued)
SCC General Timing
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.
2-64
No
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2
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5
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9
10
11
12
13
14
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16
17
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19
20
21
Symbol
TdPC(REQ)
TdPC(W)
TsRXD(RXCr)
ThRXD(RXCr)
TsRXD(RXCf)
ThRXD(RXCf)
TsSY(RXC)
ThSY(RXC)
TdTXCf(TXD)
TdTXCr(TXD)
TdTXD(TRX)
TwRTXh
TwRTXl
TcRTX
TcRTXX
TwTRXh
TwTRXl
TcTRX
TwEXT
TwSY
TxRx(DPLL)
Parameter
Clock Fall to /W//REQ Valid
Clock Fall to Wait Inactive
RxD to /RxC Rise Setup Time
RxD to /RxC Rise Hold Time
RxD to /RxC Fall Setup Time
RxD to /RxC Fall Hold Time
/SYNC to /RxC Setup Time
/SYNC to /RxC Hold Time
/TxC Fall to TxD Delay
/TxC Rise to TxD Delay
TxD to /TRxC Delay
/RTxC High Width
/RTxC Low Width
/RTxC Cycle Time (RxD, TxD)
Xtal OSC Period
/TRxC High Width
/TRxC Low Width
/TRxC Cycle Time
/DCD or /CTS Pulse Width
/SYNC Pulse Width
DPLL Cycle Time
Table D. SCC General Timing Parameters
5TcC
–150
Min
125
125
120
120
400
100
120
120
400
120
100
50
0
0
Z8018110
1000
Max
200
300
150
150
140
S
MART
Unit
A
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CCESS
C
DS971800500
ONTROLLER
[D1,4]
[D1,4]
[D2,4]
[D5,6]
[D5,7]
[D6,7]
Note
[D1]
[D1]
[D1]
[D1]
[D5]
[D5]
[D2]
[D5]
[D3]
[D5]
Z80181
SAC
™