MCHC908MR8CFAE Freescale Semiconductor, MCHC908MR8CFAE Datasheet - Page 298

• Manufacturer Part Number: MCHC908MR8CFAE
• Description: IC MCU 8K FLASH 8MHZ PWM 32-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MCHC908MR8CFAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Controller Family/series: HC08
• No. Of I/o's: 16
• Ram Memory Size: 256Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• Processor Series: HC08MR
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 64 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Operating Supply Voltage: 0 V to 5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, M68CBL05CE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

External Interrupt (IRQ)
$003F
16.4 Functional Description
Technical Data
298
Addr.
IRQ
IRQ Status/Control Register
Register Name
See page 303.
V
MODE1
DD
A logic 0 applied to any of the external interrupt pins can latch a CPU
interrupt request.
Interrupt signals on the IRQ pin are latched into the IRQ latch. An
interrupt latch remains set until one of the following actions occurs:
(ISCR)
Figure 16-2. IRQ I/O Register Summary
Figure 16-1. IRQ Module Block Diagram
•
•
•
D
CK
LATCH
ACK1
CLR
IRQ
Vector fetch — A vector fetch automatically generates an interrupt
acknowledge signal that clears the latch that caused the vector
fetch.
Software clear — Software can clear an interrupt latch by writing
to the appropriate acknowledge bit in the interrupt status and
control register (ISCR). Writing a logic 1 to the ACK1 bit clears the
IRQ latch.
Reset — A reset automatically clears both interrupt latches.
Q
Reset:
Read:
Write:
External Interrupt (IRQ)
Bit 7
R
R
0
0
Figure 16-1
IMASK1
= Reserved
R
6
0
0
SYNCHRO-
VOLTAGE
DETECT
NIZER
HIGH-
shows the structure of the IRQ module.
R
5
0
0
R
4
0
0
IRQF
3
0
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
ACK1
2
0
0
IMASK
IRQ
INTERRUPT
REQUEST
TO MODE
SELECT
LOGIC
1
1
0
MODE
Bit 0
1
0