EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 371

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

Figure 66. External I/O Read Timing
PS019209-0504
External I/O Read Timing
Figure 66 and Table 238 diagram the timing for external I/O reads. PHI clock rise/
fall to signal transition timing is independent of the particular bus mode employed
(eZ80, Z80, Intel, or Motorola).
Table 238. External I/O Read Timing
Parameter
T
T
T
T
T
T
T
ADDR[23:0]
1
2
3
4
5
6
7
DATA[7:0]
(input)
IORQ
CSx
PHI
RD
Abbreviation
PHI Clock Rise to ADDR Valid Delay
PHI Clock Rise to ADDR Hold Time
Input DATA Valid to PHI Clock Rise Setup Time
PHI Clock Rise to DATA Hold Time
PHI Clock Rise to CSx Assertion Delay
PHI Clock Rise to CSx Deassertion Delay
PHI Clock Rise to IORQ Assertion Delay
T
T
7
9
T
T
1
5
P R E L I M I N A R Y
T
CLK
T
3
T
T
2
T
T
8
10
Product Specification
8
Electrical Characteristics
T
—
2.2
0.2
0.9
2.6
2.4
2.6
4
Min
eZ80F91 MCU
Delay (ns)
6.8
—
—
—
10.8
8.8
7.0
Max
352