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| MC68HC908LB8_05 Datasheet, PDF (187/234 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers | |||
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Chapter 18
Timer Interface Module (TIM)
18.1 Introduction
This section describes the timer interface (TIM) module. The TIM is a two-channel timer (only one of the
channels is connected to an input/output pin) that provides a timing reference with input capture, output
compare, and pulse-width-modulation (PWM) functions. Figure 18-2 is a block diagram of the TIM.
M68HC08 CPU
CPU
REGISTERS
ARITHMETIC/LOGIC
UNIT (ALU)
CONTROL AND STATUS
REGISTERS â 64 BYTES
USER FLASH â 8 KBYTES
USER RAM â 128 BYTES
INTERNAL BUS
DUAL CHANNEL PWM
MODULE
HIGH RESOLUTION PWM
MODULE
LOW-VOLTAGE INHIBIT
MODULE
PTA6(1)/AD5/TCH0/KBI6
PTA5(1)/RST/KBI5
PTA4(1)/AD4/KBI4
PTA3(1)/AD3/KBI3
PTA2(1)/AD2/KBI2
PTA1(1)/AD1/KBI1
PTA0(1)/AD0/KBI0
MONITOR ROM â 350 BYTES
COMPUTER OPERATING
PROPERLY MODULE
FLASH PROGRAMMING
ROUTINES ROM â 674 BYTES
2-CHANNEL TIMER
MODULE
USER FLASH VECTOR SPACE â 34 BYTES
OSCILLATOR
MODULE
8-BIT ANALOG-TO-DIGITAL
CONVERTER MODULE
SYSTEM INTEGRATION
MODULE
KEYBOARD INTERRUPT
MODULE
VDD
POWER
VSS
OP AMP/COMPARATOR
MODULE
Notes:
1. Pin contains integrated pullup device.
2. Fault function switchable between pins PTB2 and PTB7.
Figure 18-1. Block Diagram Highlighting TIM Block and Pins
PTB7/VOUT/AD6/FAULT(2)
PTB6/Vâ
PTB5/V+
PTB4/PWM1
PTB3/PWM0
PTB2/FAULT(2)
PTB1/BOT
PTB0/TOP
PTC2(1)/SHTDWN/IRQ
PTC1(1)/OSC2
PTC0(1)/OSC1
MC68HC908LB8 Data Sheet, Rev. 1
Freescale Semiconductor
187
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