mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 35

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

1.5.3 Oscillator Pins (OSC1 and OSC2)
1.5.4 External Reset Pin (RST)
1.5.5 External Interrupt Pins (IRQ, PTE4/D–)
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
The OSC1 and OSC2 pins are the connections for the on-chip oscillator
circuit.
A logic zero on the RST pin forces the MCU to a known start-up state.
RST is bidirectional, allowing a reset of the entire system. It is driven low
when any internal reset source is asserted. The RST pin contains an
internal pullup device to V
Module
IRQ is an asynchronous external interrupt pin. IRQ is also the pin to
enter monitor mode. The IRQ pin contains a software configurable pullup
device to V
(See
Section 13. External Interrupt
Figure 1-6. Regulator Supply Capacitor Configuration
(SIM).)
DD
. PTE4/D– can be programmed to trigger the IRQ interrupt.
General Description
V
V
REG
REG
DD
. (See
C
0.1 F
> 4.7 F
+
C
REGBYPASS
MCU
REGBULK
Section 8. System Integration
(IRQ).)
V
SS
General Description
Pin Assignments
Technical Data
35