MCR908JK1ECPE Freescale Semiconductor, MCR908JK1ECPE Datasheet - Page 109

• 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

When DDRBx is a 1, reading address $0001 reads the PTBx data latch. When DDRBx is a 0, reading
address $0001 reads the voltage level on the pin. The data latch can always be written, regardless of the
state of its data direction bit.
Freescale Semiconductor
1. X = don’t care.
2. Hi-Z = high impedance.
3. Writing affects data register, but does not affect the input.
DDRB Bit
READ DDRB ($0005)
WRITE DDRB ($0005)
WRITE PTB ($0001)
READ PTB ($0001)
0
1
PTB Bit
X
Table 10-3
RESET
X
(1)
MC68HC908JL3E Family Data Sheet, Rev. 4
Table 10-3. Port B Pin Functions
Figure 10-8. Port B I/O Circuit
I/O Pin Mode
Input, Hi-Z
Output
summarizes the operation of the port B pins.
DDRBx
PTBx
(2)
Accesses to DDRB
Read/Write
DDRB[7:0]
DDRB[7:0]
Read
Pin
Pin
Accesses to PTB
To Analog-To-Digital Converter
PTB[7:0]
PTBx
PTB[7:0]
Write
(3)
Port B
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