MCR908JK1ECPE Freescale Semiconductor, MCR908JK1ECPE Datasheet - Page 107

• Manufacturer Part Number: MCR908JK1ECPE
• Description: IC MCU 1.5K FLASH 8MHZ 20-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MCR908JK1ECPE

• 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-DIP (0.300", 7.62mm)
• Processor Series: HC08JK
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Development Tools By Supplier: FSICEBASE, DEMO908JL16E, M68CBL05CE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

10.2.3 Port A Input Pull-up Enable Register (PTAPUE)
The port A input pull-up enable register (PTAPUE) contains a software configurable pull-up device for
each of the seven port A pins. Each bit is individually configurable and requires the corresponding data
direction register, DDRAx be configured as input. Each pull-up device is automatically and dynamically
disabled when its corresponding DDRAx bit is configured as output.
PTA6EN — Enable PTA6 on OSC2
PTAPUE[6:0] — Port A Input Pull-up Enable Bits
Freescale Semiconductor
Table 10-2
This read/write bit configures the OSC2 pin function when RC oscillator option is selected. This bit has
no effect for X-tal oscillator option.
These read/write bits are software programmable to enable pull-up devices on port A pins
1 = OSC2 pin configured for PTA6 I/O, and has all the interrupt and pull-up functions
0 = OSC2 pin outputs the RC oscillator clock (RCCLK)
1 = Corresponding port A pin configured to have internal pull-up if its DDRA bit is set to 0
0 = Pull-up device is disconnected on the corresponding port A pin regardless of the state of its
PTAPUE Bit
1. X = Don’t care.
2. I/O pin pulled to V
3. Writing affects data register, but does not affect input.
4. Hi-Z = High Impedance.
DDRA bit
X
1
0
summarizes the operation of the port A pins.
Address:
Reset:
Read:
Write:
DDRA
Figure 10-5. Port A Input Pull-up Enable Register (PTAPUE)
Bit
0
0
1
PTA6EN
$000D
Bit 7
DD
0
by internal pull-up.
PTA Bit
X
X
X
PTAPUE6
(1)
MC68HC908JL3E Family Data Sheet, Rev. 4
6
0
Table 10-2. Port A Pin Functions
I/O Pin Mode
Input, Hi-Z
Input, V
PTAPUE5
Output
5
0
DD
(2)
(4)
PTAPUE4
4
0
Accesses to DDRA
Read/Write
DDRA[6:0]
DDRA[6:0]
DDRA[6:0]
PTAPUE3
3
0
PTAPUE2
2
0
PTA[6:0]
Read
Pin
Pin
PTAPUE1
Accesses to PTA
1
0
PTAPUE0
Bit 0
PTA[6:0]
PTA[6:0]
PTA[6:0]
0
Write
(3)
(3)
Port A
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