S912XET512J3VALR Freescale Semiconductor, S912XET512J3VALR Datasheet - Page 110

• Manufacturer Part Number: S912XET512J3VALR
• Description: 16-bit Microcontrollers - MCU 16 BIT,512K FLASH
• Manufacturer: Freescale Semiconductor

Specifications of S912XET512J3VALR

• Rohs: yes
• Core: HCS12X
• Processor Series: MC9S12XE
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 512 KB
• Data Ram Size: 32 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3.13 V to 5.5 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: LQFP-112
• Mounting Style: SMD/SMT

1. Read: Anytime. In emulation modes, read operations will return the data from the external bus, in all other modes the data source
Chapter 2 Port Integration Module (S12XEPIMV1)
2.3.7
110
Function
Address 0x0004 (PRR)
is depending on the data direction value.
Write: Anytime. In emulation modes, write operations will also be directed to the external bus.
DDRB
Altern.
Field
Field
Reset
7-0
7-0
PC
W
R
Port B Data Direction—
This register controls the data direction of pins 7 through 0.
The external bus function forces the I/O state to be outputs for all associated pins. In this case the data direction bits
will not change.
When operating a pin as a general purpose I/O, the associated data direction bit determines whether it is an input
or output.
1 Associated pin is configured as output.
0 Associated pin is configured as high-impedance input.
Port C general purpose input/output data—Data Register
Port C pins 7 through 0 are associated with data I/O lines DATA[15:8] respectively in expanded modes.
When not used with the alternative function, these pins can be used as general purpose I/O.
If the associated data direction bits of these pins are set to 1, a read returns the value of the port register, otherwise
the buffered pin input state is read.
DATA15
Port C Data Register (PORTC)
PC7
0
7
DATA14
PC6
0
6
Table 2-8. PORTC Register Field Descriptions
Table 2-7. DDRB Register Field Descriptions
MC9S12XE-Family Reference Manual Rev. 1.25
Figure 2-5. Port C Data Register (PORTC)
DATA13
PC5
0
5
DATA12
PC4
0
4
Description
Description
DATA11
PC3
3
0
DATA10
PC2
0
2
Access: User read/write
Freescale Semiconductor
DATA9
PC1
0
1
DATA8
PC0
0
0
(1)