MC68HC908GR8CD Freescale Semiconductor, MC68HC908GR8CD Datasheet - Page 157

• Manufacturer Part Number: MC68HC908GR8CD
• Description: 8-bit Microcontrollers - MCU 8 Bit 8MHz
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC908GR8CD

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: HC08
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 384 B
• Operating Supply Voltage: 3 V to 5 V
• Package / Case: SOIC-28
• Mounting Style: SMD/SMT
• Data Rom Size: 64 KB
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 21
• Program Memory Type: Flash

When bit DDREx is a 1, reading address $0008 reads the PTEx data latch. When bit DDREx is a 0,
reading address $0008 reads the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
Freescale Semiconductor
Notes:
DDRE Bit
1. X = Don’t care
2. Hi-Z = High impedance
3. Writing affects data register, but does not affect input.
0
1
PTE Bit
X
X
(1)
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
I/O Pin Mode
Input, Hi-Z
Output
Table 16-6. Port E Pin Functions
(2)
Table 16-6
Accesses to DDRE
DDRE1–DDRE0]
DDRE1–DDRE0
Read/Write
summarizes the operation of the port E pins.
PTE1–PTE0
Read
Pin
Accesses to PTE
PTE1–PTE0
PTE1–PTE0
Write
Port E
(3)
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