MC68HC908RF2CFA Freescale Semiconductor, MC68HC908RF2CFA Datasheet - Page 95

• Manufacturer Part Number: MC68HC908RF2CFA
• Description: IC MCU W/UHF TX 2K FLASH 32LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908RF2CFA

• 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 ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

MC68HC908RF2 — Rev. 4.0
MOTOROLA
$001A
$001B
Addr.
IRQ
Keyboard Interrupt Enable
IRQ and Keyboard Status
Register Name
Register (INTKBIER)
and Control Register
DECODER
VECTOR
V
FETCH
ACKI
DD
RESET
See page 101.
See page 102.
INTERNAL
PULLUP
DEVICE
(INTKBSCR)
Interrupt signals on the IRQ pin are latched into the IRQ1 latch. Keyboard interrupts
are latched in the keyboard interrupt latch. An interrupt latch remains set until one
of these actions occurs:
Figure 7-3. IRQ and Keyboard I/O Register Summary
•
•
•
Reset:
Reset:
Read:
Read:
Write:
Write:
Vector fetch — A vector fetch automatically generates an interrupt
acknowledge signal that clears IRQ1 latch and keyboard interrupt latch.
Software clear — Software can clear an interrupt latch by writing to the
appropriate acknowledge bit in the interrupt status and control register
(INTKBSCR). Writing a 1 to the ACKI bit clears the IRQ1 latch. Writing a 1
to the ACKK bit clears the keyboard interrupt latch.
Reset — A reset automatically clears both interrupt latches.
Freescale Semiconductor, Inc.
V
MODEI
DD
For More Information On This Product,
D
CK
IRQ1F
Keyboard/External Interrupt Module (KBI)
LATCH
Bit 7
Figure 7-2. IRQ Block Diagram
IRQ1
CLR
R
0
0
0
Go to: www.freescale.com
Q
= Unimplemented
KBIE6
ACKI
6
0
0
0
IMASKI
KBIE5
5
0
0
IMASKI
SYNCHRO-
MODEI
VOLTAGE
KBIE4
DETECT
NIZER
HIGH
R
4
0
0
Keyboard/External Interrupt Module (KBI)
= Reserved
KBIE3
KEYF
R
3
0
0
IRQ1F
KEYBOARD
INTERRUPT
REQUEST
KBIE2
ACKK
2
0
0
0
IRQ1
INTERRUPT
REQUEST
Functional Description
TO CPU FOR
BIL/BIH
INSTRUCTIONS
TO MODE
SELECT
LOGIC
IMASKK
KBIE1
IRQ1/KEYBOARD
INTERRUPT
REQUEST
1
0
0
Data Sheet
MODEK
Bit 0
0
0
0
95