MC9S12E128CPV Freescale Semiconductor, MC9S12E128CPV Datasheet - Page 520

• Manufacturer Part Number: MC9S12E128CPV
• Description: Microcontrollers (MCU) 16 Bit 16MHz
• Manufacturer: Freescale Semiconductor

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

Chapter 18 Multiplexed External Bus Interface (MEBIV3)
18.3.2.2
Read: Anytime when register is in the map
Write: Anytime when register is in the map
Port B bits 7 through 0 are associated with address lines A7 through A0 respectively and data lines D7
through D0 respectively. When this port is not used for external addresses, such as in single-chip mode,
these pins can be used as general-purpose I/O. Data direction register B (DDRB) determines the primary
direction of each pin. DDRB also determines the source of data for a read of PORTB.
This register is not in the on-chip memory map in expanded and special peripheral modes. Therefore, these
accesses will be echoed externally.
520
Emulation Narrow with
IVIS, and Peripheral
Expanded Narrow
Expanded Wide,
Single Chip
Port B Data Register (PORTB)
To ensure that you read the value present on the PORTB pins, always wait
at least one cycle after writing to the DDRB register before reading from the
PORTB register.
Reset
W
R
AB/DB7
Bit 7
PB7
AB7
0
7
Figure 18-3. Port A Data Register (PORTB)
AB/DB6
PB6
AB6
6
0
6
MC9S12E128 Data Sheet, Rev. 1.07
AB/DB5
PB5
AB5
5
0
5
NOTE
AB/DB4
PB4
AB4
4
4
0
AB/DB3
PB3
AB3
3
0
3
AB/DB2
PB2
AB2
2
0
2
Freescale Semiconductor
AB/DB1
PB1
AB1
1
0
1
AB/DB0
Bit 0
PB0
AB0
0
0