MCHC908GR8AVFAE Freescale Semiconductor, MCHC908GR8AVFAE Datasheet - Page 126

• Manufacturer Part Number: MCHC908GR8AVFAE
• Description: IC MCU 8K FLASH 8MHZ 32-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MCHC908GR8AVFAE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 21
• Program Memory Size: 7.5KB (7.5K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Input/Output (I/O) Ports
Figure 12-15
When bit DDRDx is a 1, reading address $0003 reads the PTDx data latch. When bit DDRDx is a 0,
reading address $0003 reads the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
126
1. X = Don’t care
2. I/O pin pulled up to V
3. Writing affects data register, but does not affect input.
4. Hi-Z = High impedance
PTDPUE
Bit
X
1
0
shows the port D I/O logic.
DDRD
Bit
0
0
1
DD
READ DDRD ($0007)
WRITE DDRD ($0007)
WRITE PTD ($0003)
READ PTD ($0003)
by internal pullup device.
PTD
X
Bit
X
X
(1)
MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5
Input, Hi-Z
Input, V
Table 12-5. Port D Pin Functions
RESET
Figure 12-15. Port D I/O Circuit
I/O Pin
Output
Mode
DD
(2)
(4)
Table 12-5
Accesses to DDRD
DDRDx
PTDx
DDRD6–DDRD0
DDRD6–DDRD0
DDRD6–DDRD0
Read/Write
summarizes the operation of the port D pins.
PTDPUEx
PTD6–PTD0
Read
Pin
Pin
Accesses to PTD
V
DD
Freescale Semiconductor
INTERNAL
PULLUP
DEVICE
PTDx
PTD6–PTD0
PTD6–PTD0
PTD6–PTD0
Write
(3)
(3)