MC68HC705SR3CP Freescale Semiconductor, MC68HC705SR3CP Datasheet - Page 45

• Manufacturer Part Number: MC68HC705SR3CP
• Description: IC MCU 3.75K 2.1MHZ OTP 40-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705SR3CP

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: LED, POR
• Number Of I /o: 32
• Program Memory Size: 3.75KB (3.75K x 8)
• Program Memory Type: OTP
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Connectivity: -

The KBIE bit in the Miscellaneous Control Register controls the master enable for the keyboard
interrupts.
KBIE — KeyBoard Interrupt Enable
KBIC — KeyBoard Interrupt Clear
This is a write-only bit and always read as “0”.
The Keyboard Interrupt Mask Register (KBIMR) masks individual keyboard interrupt pins and
setting of the internal pull-up resistors on port A.
KBEx — PAx Keyboard Interrupt Enable
MC68HC05SR3
Miscellaneous Control Register
1 (set)
0 (clear) –
1 (set)
0 (clear) –
1 (set)
0 (clear) –
KBIMR
–
–
–
Keyboard interrupts master enabled.
Keyboard interrupts master disabled.
Writing a “1” clears the keyboard interrupt latch.
Writing a “0” has no effect.
Keyboard interrupt enabled for PAx. A 20KΩ internal pull-up resistor
is connected. High to low transition on PAx will cause a keyboard
interrupt.
Keyboard interrupt for PAx pin is masked. Any transitions on PAx will
not set any flags.
Address bit 7
Address bit 7
$0C
$0B
RESETS AND INTERRUPTS
KBE7 KBE6 KBE5 KBE4 KBE3 KBE2 KBE1 KBE0 0000 0000
KBIE
KBIC
bit 6
bit 6
INTO
bit 5
bit 5
INTE
bit 4
bit 4
LVRE
bit 3
bit 3
bit 2
bit 2
SM
IRQ2F IRQ2E 0001 0000
bit 1
bit 1
bit 0
bit 0
Freescale
on reset
on reset
State
State
TPG
5-9
5