MC9S12E256VFUE Freescale Semiconductor, MC9S12E256VFUE Datasheet - Page 260
MC9S12E256VFUE
Manufacturer Part Number
MC9S12E256VFUE
Description
IC MCU 256K FLASH 25MHZ 80-QFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.MC9S12E256CFUE.pdf
(602 pages)
Specifications of MC9S12E256VFUE
Core Processor
HCS12
Core Size
16-Bit
Speed
25MHz
Connectivity
EBI/EMI, I²C, SCI, SPI
Peripherals
POR, PWM, WDT
Number Of I /o
60
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
2.35 V ~ 2.75 V
Data Converters
A/D 16x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
80-QFP
Processor Series
S12E
Core
HCS12
Data Bus Width
16 bit
Data Ram Size
16 KB
Interface Type
I2C, SCI, SPI
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
60
Number Of Timers
12
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWHCS12
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 16 Channel
On-chip Dac
8 bit, 2 Channel
Package
80PQFP
Family Name
HCS12
Maximum Speed
50 MHz
For Use With
M68EVB912E128 - BOARD EVAL FOR MC9S12E128/64
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12E256VFUE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Chapter 8 Serial Communication Interface (SCIV4)
8.4.4
8.4.4.1
The SCI transmitter can accommodate either 8-bit or 9-bit data characters. The state of the M bit in SCI
control register 1 (SCICR1) determines the length of data characters. When transmitting 9-bit data, bit T8
in SCI data register high (SCIDRH) is the ninth bit (bit 8).
8.4.4.2
To transmit data, the MCU writes the data bits to the SCI data registers (SCIDRH/SCIDRL), which in turn
are transferred to the transmitter shift register. The transmit shift register then shifts a frame out through
the TXD pin, after it has prefaced them with a start bit and appended them with a stop bit. The SCI data
registers (SCIDRH and SCIDRL) are the write-only buffers between the internal data bus and the transmit
shift register.
The SCI also sets a flag, the transmit data register empty flag (TDRE), every time it transfers data from
the buffer (SCIDRH/L) to the transmitter shift register. The transmit driver routine may respond to this
260
TDRE INTERRUPT REQUEST
CLOCK
BUS
TC INTERRUPT REQUEST
SBR12–SBR0
Transmitter
Transmitter Character Length
Character Transmission
BAUD DIVIDER
PE
PT
M
GENERATION
PARITY
T8
16
Figure 8-13. Transmitter Block Diagram
MC9S12E256 Data Sheet, Rev. 1.08
H
11-BIT TRANSMIT SHIFT REGISTER
8
TDRE
TCIE
TIE
TC
7
6
SCI DATA REGISTERS
5
TRANSMITTER CONTROL
INTERNAL BUS
4
3
2
TE
1
0
SBK
L
TXPOL
CONTROL
LOOP
Freescale Semiconductor
LOOPS
RSRC
TO RECEIVER
SCTXD
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