XC68HC05P18A Motorola, XC68HC05P18A Datasheet - Page 46

• Manufacturer Part Number: XC68HC05P18A
• Description: HCMOS Microcontroller Unit
• Manufacturer: Motorola

Resets
5.3 External Reset (RESET)
5.4 Internal Resets
Technical Data
46
RESET
ADDRESS
IRQ
DATA
OSC
V
V
DD
DD
PULSE WIDTH = 4 X E-CLK
POWER-ON RESET
COP WATCHDOG
LOW-VOLTAGE
RESET (LVR)
(COPR)
The RESET input is the only external reset and is connected to an
internal Schmitt trigger. The external reset occurs whenever the RESET
input is driven below the lower threshold and remains in reset until the
RESET pin rises above the upper threshold. The upper and lower
thresholds are given in
The three internally generated resets are:
(POR)
•
•
•
Initial power-on reset (POR)
Computer operating properly (COP) watchdog timer
Low-voltage reset (LVR)
Figure 5-1. Reset Block Diagram
Resets
PH2
Section 13. Electrical
ONE-SHOT
CLOCKED
PH2
D
LATCH
S
Specifications.
RST
CPU
MC68HC05P18A
MOTOROLA
TO IRQ
LOGIC
PERIPHERALS
TO OTHER