Z84C90

KIO Serial/Parallel Counter Timer

PS011802-0902

18

63

TrRxC

RxC Rise Time

60

60

ns

64

TfRxC

RxC Fall Time

60

60

ns

65

TsRxD(RxCr)

RxD to RxC Rise Setup

0

0

ns

66

ThRxCr(RxD)

RxC Rise to RxD Hold Time

80

60

ns

67 TdRxCr(W/Rf) RxC Rise to W/RDY Fall Delay

10

13

10

13

ns

68 TdRxCf(INTf)

10

13

10

13

ns

69 TdRxCr

(SYNCf)

RxC Rise to SYNC Fall Delay

(Output Mode)

47

4

7

ns

70 TsSYNCf

(RxCr)

SYNC Fall to RxC Rise Setup

(External Sync Mode)

-100

-100

ns

71 TdCf(IEOr)

Clock Fall to IEO Rise Delay

90

75

ns

72 TdCf(IEOf)

Clock Fall to IEO Fall Delay

110

90

ns

73 ThDI(M1r,Rdr) Data Hold Time to M1 Rise or RD

Rise

00

ns

74 TsM1/RD(C)

Setup time for M1 and RD to clock

Rising (with Data Valid)

20

20

Notes:

1. Maximum SIO data rate is f(CLOCK) divided by 5.

2. For a Z80 CPU above 8 MHz, one Wait state is required to meet this parameter.

3. These daisy chain parameters include contributions from the PIO, SIO, and CTC cells, and vary slightly

depending on how these are ordered by the KIO command register. See Table 5.

4. Counter mode only; when using a cycle time less than 3 TcC, parameter #37 must be met.

5. units are TcC.

Table 6.Daisy Chain Parameters

8 MHz

10 MHz

12 MHz

No. Symbol

Parameter

Min

Max

Min

Max

Min

Max

U/M

(PIO at #1)

160

150

125 ns

(CTC at #1)

180

150

125 ns

(SIO at #1)

230

200

200 ns

Table 5. AC Characteristics of the Z84C90 (Continued)

8MHz

12MHz

No. Symbol

Parameter

Min

Max

Min

Max

Min Max U/M