MC9S12E128CPV Freescale Semiconductor, MC9S12E128CPV Datasheet - Page 148
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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Chapter 3 Port Integration Module (PIM9E128V1)
3.3.5
Port S is associated with the serial peripheral interface (SPI) and serial communication interfaces (SCI0
and SCI1). Each pin is assigned to these modules according to the following priority: SPI/SCI1/SCI0 >
general-purpose I/O.
When the SPI is enabled, the PS[7:4] pins become SS, SCK, MOSI, and MISO respectively. Refer to the
SPI block description chapter for information on enabling and disabling the SPI.
When the SCI1 receiver and transmitter are enabled, the PS[3:2] pins become TXD1 and RXD1
respectively. When the SCI0 receiver and transmitter are enabled, the PS[1:0] pins become TXD0 and
RXD0 respectively. Refer to the SCI block description chapter for information on enabling and disabling
the SCI receiver and transmitter.
During reset, port S pins are configured as high-impedance inputs.
3.3.5.1
Read: Anytime. Write: Anytime.
If the associated data direction bit (DDRSx) is set to 1 (output), a read returns the value of the I/O register
bit. If the associated data direction bit (DDRSx) is set to 0 (input), a read returns the value of the pin.
3.3.5.2
Read: Anytime. Write: Never, writes to this register have no effect.
This register always reads back the status of the associated pins.
148
SCI1/SCI0
Reset
Reset
SPI:
W
R
W
R
:
PTIS7
Port S
Port S I/O Register (PTS)
Port S Input Register (PTIS)
PTS7
u
7
SS
7
0
= Reserved or Unimplemented
PTIS6
PTS6
u
SCK
6
0
6
Figure 3-30. Port S Input Register (PTIS)
Figure 3-29. Port S I/O Register (PTS)
PTIS5
MC9S12E128 Data Sheet, Rev. 1.07
PTS5
MOSI
u
5
0
5
PTIS4
PTS4
MISO
u
4
0
4
u = Unaffected by reset
PTIS3
PTS3
TXD1
u
3
0
3
PTIS2
PTS2
RXD1
u
2
0
2
Freescale Semiconductor
PTIS1
PTS1
TXD0
u
1
0
1
PTIS0
PTS0
RXD0
u
0
0
0
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