Z8F1680SH020SG Datasheet, PDF (146/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
121
Data
Bus
Block
Control
System Clock
Timer
Input
(T_IN)
A
Timer Channel ^B
Inputs
(T4CHA – T4CHD)
C
D
Gate
Input
Timer and Channel
Control
C
16-Bit
O
Reload Register
M
P
A
R
16-Bit Counter
E
with Prescaler
C
O
M
Four16-Bit PWM
P
Capture Compare
A
Channels
R
E
Interrupt,
PWM,
and A
Timer _B
Output
Control ^C
D
Timer
Interrupt
Timer Channel
Outputs
(T4CHA – T4CHD)
Figure 14. Multi-Channel Timer Block Diagram
10.2. Timer Operation
This section discusses the key features of the Multi-Channel Timer, including its counter,
clock source, prescaler and counting modes.
10.2.1. Multi-Channel Timer Counter
The Multi-Channel Timer is based around a 16-bit up/down counter. The counter,
depending on the TIMER mode counts up or down with each rising edge of the clock
signal. Timer Counter registers MCTH and MCTL can be read/written by software.
10.2.2. Clock Source
The Multi-Channel Timer clock source can come from either the system clock or the
alternate function T_IN pin when the system clock is the clock source; the alternate function
T_IN input pin can perform a clock gating function. The TCLKS field in the MCTCTL0
Register selects the timer clock source. When using the T_IN pin, the associated GPIO pin,
T4CH, must be configured as an input. The T_IN frequency cannot exceed one-fourth the
system clock frequency.
PS025015-1212
PRELIMINARY
Multi-Channel Timer