mc908jl16 Freescale Semiconductor, Inc, mc908jl16 Datasheet - Page 149

• Manufacturer Part Number: mc908jl16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

When DDREx is a logic 1, reading address $0008 reads the PTEx data latch. When 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.
Freescale Semiconductor
DDRE Bit
1. X = don’t care.
2. Hi-Z = high impedance.
3. Writing affects data register, but does not affect the input.
0
1
READ DDRE ($000C)
WRITE DDRE ($000C)
WRITE PTE ($0008)
READ PTE ($0008)
PTE Bit
X
X
(1)
I/O Pin Mode
Input, Hi-Z
Table 10-5. Port E Pin Functions
RESET
MC68HC908JL16 Data Sheet, Rev. 1.1
Figure 10-16. Port E I/O Circuit
Output
(2)
Table 10-5
Accesses to DDRE
DDREX
PTEX
Read/Write
DDRE[1:0]
DDRE[1:0]
summarizes the operation of the port E pins.
PTE[1:0]
Read
Pin
Accesses to PTE
TO TIM2
PTE[1:0]
PTE[1:0]
Write
PTEX
(3)
Port E
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