MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 260

• Manufacturer Part Number: MC908AZ32ACFU
• Description: IC MCU 32K FLASH 8.4MHZ 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908AZ32ACFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: CAN, SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 40
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 15x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

I/O Ports
23.9.2 Data Direction Register H
Data direction register H determines whether each port H pin is an input or an output. Writing a logic 1 to
a DDRH bit enables the output buffer for the corresponding port H pin; a logic 0 disables the output buffer.
DDRH[1:0] — Data Direction Register H Bits
Figure 23-25
260
These read/write bits control port H data direction. Reset clears DDRG[1:0], configuring all port H pins
as inputs.
1 = Corresponding port H pin configured as output
0 = Corresponding port H pin configured as input
shows the port H I/O logic.
Address:
Avoid glitches on port H pins by writing to the port H data register before
changing data direction register H bits from 0 to 1.
Reset:
Read:
Write:
READ DDRH ($000F)
WRITE DDRH ($000F)
WRITE PTH ($000B)
READ PTH ($000B)
$000F
Bit 7
R
R
0
0
Figure 23-24. Data Direction Register H (DDRH)
= Reserved
R
6
0
0
RESET
Figure 23-25. Port H I/O Circuit
MC68HC908AZ32A Data Sheet, Rev. 2
R
5
0
0
NOTE
DDRHx
PTHx
R
4
0
0
R
3
0
0
R
2
0
0
DDRH1
1
0
Freescale Semiconductor
DDRH0
Bit 0
PTHx
0