Datasheet

MCU Block Diagram
MC68HC908QYA/QTA Family Data Sheet, Rev. 3
Freescale Semiconductor 17
1.3 MCU Block Diagram
Figure 1-1 shows the structure of the MC68HC908QY4A.
Figure 1-1. Block Diagram
RST, IRQ: Pins have internal pull up device
All port pins have programmable pull up device
PTA[0:5]: Higher current sink and source capability
PTB[0:7]: Not available on 8-pin devices
PTA0/TCH0/AD0/KBI0
PTA1/TCH1/AD1/KBI1
PTA2/IRQ
/KBI2/TCLK
PTA3/RST
/KBI3
PTA4/OSC2/AD2/KBI4
PTA5/OSC1/AD3/KBI5
2-CHANNEL 16-BIT
TIMER MODULE
KEYBOARD INTERRUPT
MODULE
SINGLE INTERRUPT
MODULE
AUTO WAKEUP
LOW-VOLTAGE
INHIBIT
COP
MODULE
6-CHANNEL
10-BIT ADC
PTB0/AD4
PTB
DDRB
M68HC08 CPU
PTA
DDRA
PTB1/AD5
PTB2
PTB3
PTB4
PTB5
PTB6
PTB7
MC68HC908QY4A
POWER SUPPLY
V
DD
V
SS
CLOCK
GENERATOR
MODULE
4096 BYTES
USER FLASH
128 BYTES
USER RAM
MONITOR ROM
MC68HC908QY4A
BREAK MODULE
DEVELOPMENT SUPPORT