z85230 ZiLOG Semiconductor, z85230 Datasheet - Page 102

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

Table 48. Z85230 System Timing Characteristics
PS005303-0907
No
1
2
3
4
5
6
7
8
9
10
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 in TcPc.
Symbol
TdRXC(REQ) RxC to W/REQ
TdRXC(W)
TdRXC(SY)
TdRXC(INT)
TdTXC(REQ) TxC to W/REQ
TdTXC(W)
TdTXC(DRQ) TxC to DTR/REQ
TdTXC(INT)
TsSY(INT)
TdEXT(INT)
Parameter
Valid
RxC to Wait
Inactive
RxC to SYNC
Valid
RxC to INT Valid
Valid
TxC to Wait
Inactive
Valid
TxC to INT Valid
SYNC to INT Valid 2
DCD or CTS to
INT Valid
2
Min
13
13
4
15
8
8
7
9
3
8.5 MHz
Max
17
17
7
21
11
14
10
13
6
8
Min
13
13
4
15
8
8
7
9
2
3
10 MHz
Max
17
17
7
21
11
14
10
13
6
8
Min
13
13
4
15
8
8
7
9
2
3
16 MHz
Max
17
17
7
21
11
14
10
13
6
8
Product Specification
Electrical Characteristics
Min
13
13
4
15
8
8
7
9
2
3
20 MHZ
Z85230/Z80230
Max
18
18
8
22
12
15
11
14
7
9
Notes
2, 4
1, 2, 4
2, 4
1, 2, 4
3, 4
1, 3, 4
3, 4
1, 3, 4
1, 4
1, 4
97