Z8674312PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z8674312PSC' PDF : 84 Pages View PDF
CMOS Z8® OTP Microcontrollers
Product Specification
37
Table 18. Additional Timing Table (Divide by Two Mode) TA = -40 °C to +105 °C (Continued)
No Symbol Parameter
VCC1 Min
12 Twdt
Watchdog Timer 3.5V 7
Delay Time Before 5.5V 3.5
Timeout
3.5V 14
Max Min
10
5
20
Max
Units Conditions
ms D0 =0
ms D1 = 0
ms D0 =1
Notes
8,9
5,11
5,11
5.5V 7
10
ms D1 = 0
5,11
3.5V 28
40
ms D1 = 0
5,11
5.5V 14
20
ms D1 = 1
5,11
3.5V 112
160
ms D0 = 1
5,11
5.5V 56
80
ms D1 = 1
5,11
Notes
1. The VCC voltage specification of 5.5 V guarantees 5.0 V ± 0.5 V and the VCC voltage specification of 3.5 V
guarantees only 3.5 V.
2. Timing Reference uses 0.7 VC0 for a logic 1 and 0.2 VGC for a logic 0.
3. SMR D1 = 0.
4. SMR-D5 = 1, POR STOP Mode Delay is on
5. Interrupt request via Port 3 (P31-P33)
6. Interrupt request via Port 3 (P30).
7. Maximum frequency for internal system clock is 2 MHz when using Low EMI OSC PCON Bit D7 = 0
8. Reg. WDTMR.
9. Using internal RC.
Pin Functions
EPROM Programming Mode
D7-D0 Data Bus. The data can be read from or written to external memory through the
data bus.
VCC Power Supply. This pin must supply 5 V during the EPROM read mode and 6 V dur-
ing other modes.
CE Chip Enable (active Low). This pin is active during EPROM Read Mode, Program
Mode, and Program Verify Mode.
OE Output Enable (active Low). This pin drives the direction of the Data Bus. When this
pin is Low, the Data Bus is output, when High, the Data Bus is input.
EPM EPROM Program Mode. This pin controls the different EPROM Program Mode by
applying different voltages.
VPP Program Voltage. This pin supplies the program voltage.
PGM Program Mode (active Low). When this pin is Low, the data is programmed to the
EPROM through the Data Bus.
PS022901-0508
Electrical Characteristics
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