mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 249

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908BD48
Freescale Semiconductor
DDRE Bit
Notes:
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)
Rev. 2.1
When bit DDREx is a logic 1, reading address $0008 reads the PTEx
data latch. When bit DDREx is a logic 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.
the operation of the port E pins.
I/O Pin Mode
Input, Hi-Z
Output
Table 17-7. Port E Pin Functions
READ DDRE ($0009)
WRITE DDRE ($0009)
WRITE PTE ($0008)
READ PTE ($0008)
(2)
Input/Output (I/O) Ports
Accesses to DDRE
Figure 17-18. Port E I/O Circuit
DDRE2–DDRE0]
RESET
DDRE2–DDRE0
Read/Write
DDREx
PTEx
PTE2–PTE0
Read
Pin
Table 17-7
Accesses to PTE
Input/Output (I/O) Ports
PTE2–PTE0
PTE2–PTE0
summarizes
Write
Data Sheet
PTEx
(3)
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