MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 258

• 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
23.8.2 Data Direction Register G
Data direction register G determines whether each port G pin is an input or an output. Writing a logic 1 to
a DDRG bit enables the output buffer for the corresponding port G pin; a logic 0 disables the output buffer.
DDRG[2:0] — Data Direction Register G Bits
Figure 23-22
258
These read/write bits control port G data direction. Reset clears DDRG[2:0], configuring all port G pins
as inputs.
1 = Corresponding port G pin configured as output
0 = Corresponding port G pin configured as input
shows the port G I/O logic.
Address:
Avoid glitches on port G pins by writing to the port G data register before
changing data direction register G bits from 0 to 1.
Reset:
Read:
Write:
READ DDRG ($000E)
WRITE DDRG ($000E)
WRITE PTG ($000A)
READ PTG ($000A)
$000E
Bit 7
R
R
0
0
Figure 23-21. Data Direction Register G (DDRG)
= Reserved
R
6
0
0
RESET
Figure 23-22. Port G I/O Circuit
MC68HC908AZ32A Data Sheet, Rev. 2
R
5
0
0
NOTE
DDRGx
PTGx
R
4
0
0
R
3
0
0
DDRG2
2
0
DDRG1
1
0
Freescale Semiconductor
DDRG0
Bit 0
PTGx
0