ZiLOG Z8

Z8 Microcontrollers
ZiLOG List of Figures
Figure Title Page
UM001601-0803 xi
Z8 Output Handshake ...............................................................................................................5-21
Output Strobed Handshake on Port 2 .......................................................................................5-23
Input Strobed Handshake on Port 2 ..........................................................................................5-23
Port 0/1 Reset ............................................................................................................................5-24
Port 2 Reset ...............................................................................................................................5-25
Port 3 Mode Reset .....................................................................................................................5-25
Port 3 Input Analog Selection ....................................................................................................5-26
Port 3 Comparator Output Selection .........................................................................................5-26
Port Configuration of Comparator Inputs on P31, P32, and P33 ...............................................5-27
Port 3 Configuration ...................................................................................................................5-28
Port 2 Configuration ...................................................................................................................5-30
Port Configuration Register (PCON) (Write-Only) .....................................................................5-30
Diode Input Protection ...............................................................................................................5-31
OTP Diode Input Protection .......................................................................................................5-31
Simplified CMOS Z8 I/O Circuit .................................................................................................5-32
Auto Latch Equivalent Circuit ...................................................................................... 5-33
Effect of Pulldown Resistors on Auto Latches ...........................................................................5-33
Chapter 6. Counter/Timers
Counter/Timer Block Diagram .....................................................................................................6-1
Counter/Timer Register Map .......................................................................................................6-2
Prescaler 0 Register ....................................................................................................................6-2
Prescaler 1 Register ....................................................................................................................6-2
Counter / Timer 0 and 1 Registers ..............................................................................................6-2
Timer Mode Register ...................................................................................................................6-3
Starting The Count ......................................................................................................................6-3
Counting Modes ..........................................................................................................................6-3
Timer Mode Register (T
OUT
Operation) .......................................................................................6-5
Port 3 Mode Register (T
OUT
Operation) .......................................................................................6-5
T0 and T1 Output Through T
OUT
.................................................................................................6-6
Chapter 6. Counter/Timers (Continued)
Internal Clock Output Through T
OUT
........................................................................................... 6-6
Timer Mode Register (T
IN
Operation) ..........................................................................................6-7
Prescaler 1 Register (T
IN
Operation) ...........................................................................................6-7
External Clock Input Mode ..........................................................................................................6-8
Gated Clock Input Mode ..............................................................................................................6-9
Triggered Clock Mode ...............................................................................................................6-10
Cascaded Counter/Timers .........................................................................................................6-11
Counter/Timer Reset .................................................................................................................6-12
Prescaler 1 Register Reset ........................................................................................................6-12