mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 275

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

14.6 Port E
14.6.1 Port E Data Register
MC68HC908JB16
Freescale Semiconductor
—
Rev. 1.1
Additional
Additional
Alternative
Function:
Function:
Function:
Address:
Port E is a 5-bit special function port that shares three of its pins with the
timer interface modules (TIMs) and two of its pins with the USB data pins
D+ and D–. PTE4 and PTE3 are open-drain when configured as output.
The port E data register contains a data latch for each of the five
port E pins.
PTE[4:0] — Port E Data Bits
Reset:
Read:
Write:
PTE[4:0] are read/write, software-programmable bits. Data direction
of each port E pin is under the control of the corresponding bit in data
direction register E.
The PTE4 and PTE3 pullup enable bits, PTE4P and PTE3P, in the
port option control register (POCR) enable 5kΩ pullups on PTE4 and
PTE3 if the respective pin is configured as an input and the USB
module is disabled. (See
$0008
Bit 7
0
Figure 14-11. Port E Data Register (PTE)
Input/Output (I/O) Ports
= Unimplemented
6
0
5
0
14.7 Port
Open-drain Open-drain
Optional
External
interrupt
Unaffected by reset
pullup
PTE4
D–
4
Options.)
Optional
pullup
PTE3
D+
3
T2CH01
Optional
pullup
PTE2
2
Input/Output (I/O) Ports
T1CH01
Optional
pullup
PTE1
1
Technical Data
Optional
pullup
TCLK
PTE0
Bit 0
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