MC68HC908RF2MFA Freescale Semiconductor, MC68HC908RF2MFA Datasheet - Page 101

• Manufacturer Part Number: MC68HC908RF2MFA
• Description: IC MCU 2K FLASH 4MHZ 32-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908RF2MFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: LVD, POR, PWM, RF Mod
• Number Of I /o: 12
• Program Memory Size: 2KB (2K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

7.5 I/O Registers
7.5.1 IRQ and Keyboard Status and Control Register
MC68HC908RF2 — Rev. 4.0
MOTOROLA
These registers control and monitor operation of the keyboard/external interrupt
module:
The IRQ and keyboard status and control register (INTKBSCR) controls and
monitors operation of the keyboard/external interrupt module. The INTKBSCR has
these functions:
IRQ1F — IRQ Flag Bit
ACKI — IRQ Interrupt Request Acknowledge Bit
IMASKI — IRQ Interrupt Mask Bit
MODEI — IRQ Triggering Sensitivity Bit
Figure 7-6. IRQ and Keyboard Status and Control Register (INTKBSCR)
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Address: $001A
This read-only status bit is high when the IRQ interrupt is pending.
Writing a 1 to this write-only bit clears the IRQ latch. ACKI always reads as 0.
Reset clears ACKI.
Writing a 1 to this read/write bit disables IRQ interrupt requests. Reset clears
IMASKI.
This read/write bit controls the triggering sensitivity of the IRQ pin. Reset clears
MODEI.
Reset:
Read:
Write:
1 = IRQ interrupt pending
0 = IRQ interrupt not pending
1 = IRQ interrupt requests disabled
0 = IRQ interrupt requests enabled
1 = IRQ interrupt requests on falling edges and low levels
0 = interrupt requests on falling edges only
IRQ and keyboard status and control register, INTKBSCR
Keyboard interrupt enable register, KBIER
Flags the keyboard interrupt requests
Acknowledges the keyboard interrupt requests
Masks the keyboard interrupt requests
Shows the state of the IRQ1 interrupt flag
Clears the IRQ interrupt latch
Masks the IRQ interrupt request
Controls the triggering sensitivity of the keyboard and IRQ interrupt pins
Freescale Semiconductor, Inc.
For More Information On This Product,
IRQ1F
Bit 7
Keyboard/External Interrupt Module (KBI)
R
R
0
Go to: www.freescale.com
= Reserved
ACKI
6
0
0
IMASKI
5
0
MODEI
4
0
Keyboard/External Interrupt Module (KBI)
KEYF
R
3
0
ACKK
2
0
0
IMASKK
1
0
I/O Registers
Data Sheet
MODEK
Bit 0
0
101