z86d73 ZiLOG Semiconductor, z86d73 Datasheet - Page 24

• Manufacturer Part Number: z86d73
• Description: 40/44/48-pin Low-voltage
• Manufacturer: ZiLOG Semiconductor

Pin Functions
PS019402-1103
No Sym
12 Twdt
Notes:
1. Timing Reference uses 0.9 V
2. Interrupt request through Port 3 (P33–P31).
3. Interrupt request through Port 3 (P30).
4. SMR – D5 = 0.
5. For internal RC oscillator.
DS (Output, Active Low)
AS (Output, Active Low)
Table 8. Additional Timing (Continued)
The Data Strobe is activated one time for each external memory transfer. For a
READ operation, data must be available prior to the trailing edge of DS. For
WRITE operations, the falling edge of DS indicates that output data is valid.
Address Strobe is pulsed one time at the beginning of each machine cycle.
Address output is through Port 0/Port 1 for all external programs. Memory address
transfers are valid at the trailing edge of AS. Under program control, AS is placed
in the high-impedance state along with Ports 0 and 1, Data Strobe, and Read/
Write.
Parameter
Watch-Dog Timer
Delay Time
CC
for a logic 1 and 0.1 V
P
V
2.0 V
3.6 V
2.0 V
3.6 V
2.0 V
3.6 V
2.0 V
3.6 V
R
CC
E
L
T
8.0 MHz
Min
12
5
25
10
50
20
200
80
I
A
= 0 °C to +70 °C
M
CC
I
for a logic 0.
N
Max
A
40/44/48-Pin Low-Voltage IR OTP
R
Y
Units Notes
ms
ms
ms
ms
ms
ms
ms
ms
5
5
5
5
5
5
5
5
Stop-Mode
Recovery
(D1, D0)
0, 0
0, 1
1, 0
1, 1
Z86D73
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