s908ey16g2vfar Freescale Semiconductor, Inc, s908ey16g2vfar Datasheet - Page 131

• Manufacturer Part Number: s908ey16g2vfar
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

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
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
DDRE
Bit
0
1
READ DDRE ($000A)
WRITE DDRE ($000A)
WRITE PTE ($0008)
READ PTE($0008)
PTE
Bit
X
X
MC68HC908EY16A • MC68HC908EY8A Data Sheet, Rev. 1
Input, Hi-Z
I/O Pin
Output
Mode
Table 12-5. Port E Pin Functions
RESET
Figure 12-15. Port E I/O Circuit
Accesses to DDRE
Table 12-5
Read/Write
DDREx
DDRE[1:0]
DDRE[1:0]
PTEx
summarizes the operation of the port E pins.
PTE[1:0]
Read
Pin
Accesses to PTE
PTE[1:0]
PTE[1:0]
Write
PTEx
(1)
Port E
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