MC68HC908QY4A_10 Datasheet, PDF (94/200 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Oscillator (OSC) Module
PTA0/TCH0/AD0/KBI0
PTA1/TCH1/AD1/KBI1
PTA2/IRQ/KBI2/TCLK
PTA3/RST/KBI3
PTA4/OSC2/AD2/KBI4
PTA5/OSC1/AD3/KBI5
PTB0/AD4
PTB1/AD5
PTB2
PTB3
PTB4
PTB5
PTB6
PTB7
MC68HC908QY4A
128 BYTES
USER RAM
M68HC08 CPU
MC68HC908QY4A
4096 BYTES
USER FLASH
CLOCK
GENERATOR
KEYBOARD INTERRUPT
MODULE
SINGLE INTERRUPT
MODULE
AUTO WAKEUP
MODULE
LOW-VOLTAGE
INHIBIT
2-CHANNEL 16-BIT
TIMER MODULE
COP
MODULE
6-CHANNEL
10-BIT ADC
V_DD
POWER SUPPLY
V_SS
DEVELOPMENT SUPPORT
MONITOR ROM
BREAK MODULE
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
Figure 11-1. Block Diagram Highlighting OSC Block and Pins
11.3.1 Internal Signal Definitions
The following signals and clocks are used in the functional description and figures of the OSC module.
11.3.1.1 Oscillator Enable Signal (SIMOSCEN)
The SIMOSCEN signal comes from the system integration module (SIM) and disables the XTAL oscillator
circuit, the RC oscillator, or the internal oscillator in stop mode. OSCENINSTOP in the configuration
register can be used to override this signal.
MC68HC908QYA/QTA Family Data Sheet, Rev. 3
94
Freescale Semiconductor