MC68HC912B32CFU8 Freescale Semiconductor, MC68HC912B32CFU8 Datasheet - Page 86

• Manufacturer Part Number: MC68HC912B32CFU8
• Description: IC MCU 32K FLASH 8MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC68HC912B32CFU8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 768 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Bus Control and Input/Output (I/O)
be set. In this special case of expanded mode and EME set, the port E data register (PORTE) and port E
data direction register (DDRE) are removed from the on-chip memory map and become external
accesses so port E may be rebuilt externally.
6.3.1 Port A Data Register
Read: Anytime, if register is in the map
Write: Anytime, if register is in the map
Bits PA7–PA0 are associated with addresses ADDR15–ADDR8 and DATA15–DATA8. When this port is
not used for external addresses and data, such as in single-chip mode, these pins can be used as
general-purpose input/output (I/O). DDRA determines the primary direction of each pin. This register is
not in the on-chip map in expanded and peripheral modes.
6.3.2 Port A Data Direction Register
Read: Anytime, if register is in the map
Write: Anytime, if register is in the map
This register determines the primary direction for each port A pin when functioning as a general-purpose
I/O port. DDRA is not in the on-chip map in expanded and peripheral modes.
86
Expanded wide and peripheral:
1 = Associated pin is an output.
0 = Associated pin is a high-impedance input.
Address: $0002
Expanded narrow:
Reset:
Read:
Write:
Address: $0000
Reset:
Read:
Write:
DDA7
Bit 7
0
Figure 6-2. Port A Data Direction Register (DDRA)
DATA15/7
ADDR15
ADDR15
DATA15
Bit 7
PA7
Figure 6-1. Port A Data Register (PORTA)
DDA6
6
0
M68HC12B Family Data Sheet, Rev. 9.1
DATA14/6
ADDR14
ADDR14
DATA14
PA6
6
DDA5
5
0
DATA13/5
ADDR13
ADDR13
DATA13
PA5
5
DDA4
4
0
DATA12/4
ADDR12
ADDR12
DATA12
Unaffected by reset
PA4
4
DDA3
3
0
DATA11/3
ADDR11
ADDR11
DATA11
PA3
DDA2
3
2
0
DATA10/2
ADDR10
ADDR10
DATA10
PA2
DDA1
2
1
0
DATA9/1
Freescale Semiconductor
ADDR9
ADDR9
DATA9
PA1
DDA0
1
Bit 0
0
DATA8/0
ADDR8
ADDR8
DATA8
Bit 0
PA0