XC68HC08KH12 Motorola, XC68HC08KH12 Datasheet - Page 195

• Manufacturer Part Number: XC68HC08KH12
• Description: MICROCONTROLLER
• Manufacturer: Motorola

12.7 Port E
12.7.1 Port E Data Register (PTE)
MC68HC(7)08KH12
MOTOROLA
—
Rev. 1.0
Function:
Function:
Alternate
Alternate
Address:
Port E is a 5-bit special function port that shares four of its pins with the
keyboard interrupt module (KBI) and shares three of its pins with the
timer interface module (TIM). PTE3–PTE0 pins have built-in schmitt
triggered input and software configurable pull-up; In addition,
PTE3–PTE0 pins have built-in optical interface circuit which can be
enabled via the Port-E Optical Interface Enable Register.
The port E data register contains a data latch for each of the five port E
pins.
Reset:
DDRD
1. X = don’t care
2. Hi-Z = high impedance
3. Writing affects data register, but does not affect input.
Read:
Write:
Bit
0
1
$0008
Bit 7
PTD Bit
0
X
X
(1)
Figure 12-13. Port E Data Register (PTE)
= Unimplemented
6
0
Table 12-5. Port D Pin Functions
I/O Pin Mode
I/O Ports
Input, Hi-Z
Output
5
0
(2)
Unaffected by reset
PTE4
4
Accesses to
Read/Write
DDRD[7:0]
DDRD[7:0]
DDRD
PTE3
KBE3
3
TCH1
PTE2
KBE2
PTD[7:0]
2
Read
Accesses to PTD
Pin
Advance Information
PTE1
KBE1
TCH0
1
PTD[7:0]
PTD[7:0]
Write
I/O Ports
KBE0
TCLK
PTE0
Bit 0
Port E
195
(3)