MC908JB8ADWE Freescale Semiconductor, MC908JB8ADWE Datasheet - Page 202

• Manufacturer Part Number: MC908JB8ADWE
• Description: IC MCU 3MHZ 8K FLASH 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908JB8ADWE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 3MHz
• Connectivity: USB
• Peripherals: LVD, POR, PWM
• Number Of I /o: 21
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: HC08JB
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: USB
• Maximum Clock Frequency: 3 MHz
• Number Of Programmable I/os: 37
• Number Of Timers: 2
• Operating Supply Voltage: 5.25 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, DEMO908GZ60E, M68EML08GZE, KITUSBSPIDGLEVME, KITUSBSPIEVME, KIT33810EKEVME
• Minimum Operating Temperature: 0 C
• Controller Family/series: HC08
• No. Of I/o's: 21
• Ram Memory Size: 256Byte
• Cpu Speed: 8MHz
• No. Of Timers: 1
• Embedded Interface Type: SCI, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Input/Output Ports (I/O)
12.3 Port A
12.3.1 Port A Data Register
Technical Data
202
Additional
Alternativ
Function:
Function:
Address:
Port A is an 8-bit general-purpose bidirectional I/O port with software
configurable pullups, and it shares its pins with the keyboard interrupt
module (KBI).
The port A data register contains a data latch for each of the eight port A
pins.
PTA[7:0] — Port A Data Bits
KBA7–KBA0 — Keyboard Interrupts
Reset:
Read:
Write:
These read/write bits are software programmable. Data direction of
each port A pin is under the control of the corresponding bit in data
direction register A. Reset has no effect on port A data.
The port A pullup enable bit, PAP, in the port option control register
(POCR) enables pullups on port A pins if the respective pin is
configured as an input. (See
The keyboard interrupt enable bits, KBIE7–KBIE0, in the keyboard
interrupt enable register (KBIER), enable the port A pins as external
interrupt pins. (See
e
Optional
$0000
KBA7
pullup
PTA7
Bit 7
Figure 12-2. Port A Data Register (PTA)
Input/Output Ports (I/O)
Optional
KBA6
pullup
PTA6
6
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Section 14. Keyboard Interrupt Module
Optional
pullup
KBA5
PTA5
5
12.8 Port
Optional
Unaffected by reset
pullup
KBA4
PTA4
4
Optional
pullup
KBA3
PTA3
Options.)
3
Optional
pullup
KBA2
PTA2
Freescale Semiconductor
2
Optional
pullup
KBA1
PTA1
1
Optional
(KBI).)
pullup
KBA0
PTA0
Bit 0