MC68908GZ8MFAE Freescale Semiconductor, MC68908GZ8MFAE Datasheet - Page 158

• Manufacturer Part Number: MC68908GZ8MFAE
• Description: IC MCU 8BIT 8K FLASH 48-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68908GZ8MFAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: CAN, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 37
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• Processor Series: M689xx
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SPI, SCI, CAN
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 37
• Number Of Timers: 2
• Operating Supply Voltage: 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, M68CBL05AE, DEMO908GZ60E, M68EML08GZE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Input/Output (I/O) Ports
13.3 Port A
Port A is an 8-bit special-function port that shares all eight of its pins with the keyboard interrupt (KBI)
module. Port A also has software configurable pullup devices if configured as an input port.
13.3.1 Port A Data Register
The port A data register (PTA) contains a data latch for each of the eight port A pins.
PTA7–PTA0 — Port A Data Bits
KBD7–KBD0 — Keyboard Inputs
13.3.2 Data Direction Register A
Data direction register A (DDRA) determines whether each port A pin is an input or an output. Writing a
logic 1 to a DDRA bit enables the output buffer for the corresponding port A pin; a logic 0 disables the
output buffer.
DDRA7–DDRA0 — Data Direction Register A Bits
158
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 keyboard interrupt enable bits, KBIE7–KBIE0, in the keyboard interrupt control register (KBICR)
enable the port A pins as external interrupt pins. See
These read/write bits control port A data direction. Reset clears DDRA7–DDRA0, configuring all port
A pins as inputs.
1 = Corresponding port A pin configured as output
0 = Corresponding port A pin configured as input
Alternative
Function:
Address:
Address:
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.
Reset:
Reset:
Read:
Read:
Write:
Write:
DDRA7
$0000
$0004
KBD7
PTA7
Bit 7
Bit 7
0
Figure 13-3. Data Direction Register A (DDRA)
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
Figure 13-2. Port A Data Register (PTA)
DDRA6
PTA6
KBD6
6
6
0
DDRA5
PTA5
KBD5
5
5
0
NOTE
DDRA4
Unaffected by reset
PTA4
KBD4
4
4
0
Chapter 9 Keyboard Interrupt Module (KBI).
DDRA3
KBD3
PTA3
3
3
0
DDRA2
KBD2
PTA2
2
2
0
DDRA1
KBD1
PTA1
1
1
0
Freescale Semiconductor
DDRA0
KBD0
PTA0
Bit 0
Bit 0
0