MC9S12E128CPV Freescale Semiconductor, MC9S12E128CPV Datasheet - Page 535
MC9S12E128CPV
Manufacturer Part Number
MC9S12E128CPV
Description
Microcontrollers (MCU) 16 Bit 16MHz
Manufacturer
Freescale Semiconductor
Datasheet
1.MC9S12E128CPV.pdf
(606 pages)
Specifications of MC9S12E128CPV
Data Bus Width
16 bit
Program Memory Type
Flash
Program Memory Size
128 KB
Data Ram Size
8 KB
Interface Type
SCI, SPI
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
92
Number Of Timers
16 bit
Operating Supply Voltage
3.135 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
LQFP-112
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
On-chip Dac
8 bit, 2 Channel
Lead Free Status / Rohs Status
No RoHS Version Available
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18.3.2.16 Port K Data Direction Register (DDRK)
Read: Anytime
Write: Anytime
This register determines the primary direction for each port K pin configured as general-purpose I/O. This
register is not in the map in peripheral or expanded modes while the EMK control bit in MODE register is
set. Therefore, these accesses will be echoed externally.
Freescale Semiconductor
DDRK
Field
7:0
Reset
W
R
Data Direction Port K Bits
0 Associated pin is a high-impedance input
1 Associated pin is an output
Note: It is unwise to write PORTK and DDRK as a word access. If you are changing port K pins from inputs to
Note: To ensure that you read the correct value from the PORTK pins, always wait at least one cycle after writing
Bit 7
0
7
outputs, the data may have extra transitions during the write. It is best to initialize PORTK before enabling
as outputs.
to the DDRK register before reading from the PORTK register.
Figure 18-20. Port K Data Direction Register (DDRK)
6
0
6
Table 18-14. EBICTL Field Descriptions
MC9S12E128 Data Sheet, Rev. 1.07
5
0
5
4
0
4
Description
Chapter 18 Multiplexed External Bus Interface (MEBIV3)
3
3
0
2
2
0
1
0
1
Bit 0
0
0
535
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