MCR908JK1CDWE Freescale Semiconductor, MCR908JK1CDWE Datasheet - Page 152
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MCR908JK1CDWE
Manufacturer Part Number
MCR908JK1CDWE
Description
IC MCU 1.5K FLASH 20-SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68HC908JK1CDW.pdf
(212 pages)
Specifications of MCR908JK1CDWE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LED, LVD, POR, PWM
Number Of I /o
14
Program Memory Size
1.5KB (1.5K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.3 V
Data Converters
A/D 12x8b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
- Current page: 152 of 212
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I/O Ports
12.4.1 Data Direction Register A (DDRA)
Technical Data
150
NOTE:
Address:
Data direction register A determines whether each port A pin is an input
or an output. Writing a logic one to a DDRA bit enables the output buffer
for the corresponding port A pin; a logic zero disables the output buffer.
DDRA[6:0] — Data Direction Register A Bits
Avoid glitches on port A pins by writing to the port A data register before
changing data direction register A bits from 0 to 1.
Figure 12-4
Reset:
Read:
Write:
These read/write bits control port A data direction. Reset clears
DDRA[6:0], configuring all port A pins as inputs.
1 = Corresponding port A pin configured as output
0 = Corresponding port A pin configured as input
$0004
Bit 7
0
0
Figure 12-3. Data Direction Register A (DDRA)
shows the port A I/O logic.
DDRA6
6
0
I/O Ports
DDRA5
5
0
DDRA4
4
0
DDRA3
3
0
MC68H(R)C908JL3
DDRA2
Freescale Semiconductor
2
0
DDRA1
1
0
—
Rev. 1.1
DDRA0
Bit 0
0
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