MC68HC908GR8CD Freescale Semiconductor, MC68HC908GR8CD Datasheet - Page 46

• Manufacturer Part Number: MC68HC908GR8CD
• Description: 8-bit Microcontrollers - MCU 8 Bit 8MHz
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC908GR8CD

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: HC08
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 384 B
• Operating Supply Voltage: 3 V to 5 V
• Package / Case: SOIC-28
• Mounting Style: SMD/SMT
• Data Rom Size: 64 KB
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 21
• Program Memory Type: Flash

Resets and Interrupts
POR — Power-On Reset Flag
PIN — External Reset Flag
COP — Computer Operating Properly Reset Bit
ILOP — Illegal Opcode Reset Bit
ILAD — Illegal Address Reset Bit
MODRST — Monitor Mode Entry Module Reset Bit
LVI — Low-Voltage Inhibit Reset Bit
4.3 Interrupts
An interrupt temporarily changes the sequence of program execution to respond to a particular event. An
interrupt does not stop the operation of the instruction being executed, but begins when the current
instruction completes its operation.
46
1 = Power-on reset since last read of SRSR
0 = Read of SRSR since last power-on reset
1 = External reset via RST pin since last read of SRSR
0 = POR or read of SRSR since last external reset
1 = Last reset caused by timeout of COP counter
0 = POR or read of SRSR
1 = Last reset caused by an illegal opcode
0 = POR or read of SRSR
1 = Last reset caused by an opcode fetch from an illegal address
0 = POR or read of SRSR
1 = Last reset caused by monitor mode entry when vector locations $FFFE and $FFFF are $FF after
0 = POR or read of SRSR
1 = Last reset caused by low-power supply voltage
0 = POR or read of SRSR
POR while IRQ = V
Address:
Read:
Write:
POR:
$FE01
POR
Bit 7
1
Figure 4-2. SIM Reset Status Register (SRSR)
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
DD
= Unimplemented
PIN
6
0
COP
5
0
ILOP
4
0
ILAD
3
0
MODRST
2
0
LVI
1
0
Freescale Semiconductor
Bit 0
0
0