MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 396

• Manufacturer Part Number: MC68HC908LK24
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Input/Output (I/O) Ports
18.7.3 Port E LED Control Register (LEDE)
Data Sheet
396
Address:
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.
Table 18-6
The port-E LED control register (LEDE) controls the direct LED drive
capability on PTE7–PTE0 pins. Each bit is individually configurable and
requires that the data direction register, DDRE, bit be configured as an
output.
LEDE[7:0] — Port E LED Drive Enable Bits
Notes:
Reset:
1. X = don’t care; except.
2. Hi-Z = high impedance.
3. Writing affects data register, but does not affect input.
Read:
Write:
DDRE
Freescale Semiconductor, Inc.
These read/write bits are software programmable to enable the direct
LED drive on an output port pin.
Bit
0
1
For More Information On This Product,
1 = Corresponding port E pin is configured for direct LED drive,
0 = Corresponding port E pin is configured for standard drive
LEDE7
$000E
Figure 18-19. Port E LED Control Register (LEDE)
Bit 7
PTE Bit
with 15mA current sinking capability
0
X
summarizes the operation of the port E pins.
X
(1)
Go to: www.freescale.com
Input/Output (I/O) Ports
LEDE6
6
0
Input, Hi-Z
Table 18-6. Port E Pin Functions
I/O Pin Mode
Output
LEDE5
5
0
(2)
Accesses to DDRE
LEDE4
4
0
DDRE[7:0]
DDRE[7:0]
Read/Write
LEDE3
3
0
MC68HC908LJ24/LK24 — Rev. 2
LEDE2
PTE[7:0]
2
0
Read
Pin
Accesses to PTE
LEDE1
1
0
MOTOROLA
PTE[7:0]
PTE[7:0]
Write
LEDE0
Bit 0
0
(3)