Datasheet

General Description
Pin Assignments
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3 Technical Data
Freescale Semiconductor General Description 35
Figure 1-6. Regulator Supply Capacitor Configuration
1.5.3 Oscillator Pins (OSC1 and OSC2)
The OSC1 and OSC2 pins are the connections for the on-chip oscillator
circuit.
1.5.4 External Reset Pin (RST)
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
DD
. (See Section 8. System Integration
Module (SIM).)
1.5.5 External Interrupt Pins (IRQ
, PTE4/D–)
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
DD
. PTE4/D– can be programmed to trigger the IRQ interrupt.
(See Section 13. External Interrupt (IRQ).)
MCU
V
REG
C
REGBULK
C
REGBYPASS
0.1 µF
V
SS
+
V
REG
> 4.7 µF