Z8673312PSG Datasheet, PDF (57/84 Pages) Zilog, Inc. – CMOS Z8 OTP Microcontrollers

CMOS Z8^® OTP Microcontrollers
Product Specification
53
OSC
÷2
Internal Data Bus
Write
Write
Read
PRE0
Initial Value
Register
T0
Initial Value
Register
T0
Current Value
Register
÷16
÷4
Internal
Clock
External Clock
Clock
Logic
÷4
6-Bit
Down
Counter
6-Bit
Down
Counter
8-Bit
Down
Counter
÷2
8-Bit
Down
Counter
IRQ4
T_OUT
P36
IRQ5
Internal Clock
Gated Clock
Triggered Clock
T_IN P31
PRE1
Initial Value
Register
T1
Initial Value
Register
T1
Current Value
Register
Write
Write
Read
Internal Data Bus
Figure 27. Counter/Timer Block Diagram
Interrupts. The MCU has six different interrupts from six different sources. The inter-
rupts are maskable and prioritized (Figure 28). The six sources are divided as follows: four
sources are claimed by Port 3 lines P33-P30) and two in counter/timers. The Interrupt
Mask Register globally or individually enables or disables the six interrupt requests
(Table 20).
PS022901-0508
Electrical Characteristics