MC9S12E256VPVE Freescale Semiconductor, MC9S12E256VPVE Datasheet - Page 89

• Manufacturer Part Number: MC9S12E256VPVE
• Description: IC MCU 256K FLASH 25MHZ 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12E256VPVE

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 91
• 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: 112-LQFP
• 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: 92
• 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: 16-ch x 10-bit
• On-chip Dac: 2-ch x 8-bit
• 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: Lead free / RoHS Compliant

2.3.2.1
The unbanked FCLKDIV register is used to control timed events in program and erase algorithms.
All bits in the FCLKDIV register are readable, bits 6-0 are write once and bit 7 is not writable.
Freescale Semiconductor
FDIV[5:0]
FDIVLD
PRDIV8
RESERVED2
RESERVED3
RESERVED4
Reset
Field
Register
5-0
7
6
Name
W
R
FDIVLD
Clock Divider Loaded.
0 Register has not been written.
1 Register has been written to since the last reset.
Enable Prescalar by 8
0 The oscillator clock is directly fed into the clock divider
1 The oscillator clock is divided by 8 before feeding into the clock divider.
Clock Divider Bits — The combination of PRDIV8 and FDIV[5:0] must divide the oscillator clock down to a
frequency of 150 kHz–200 kHz. The maximum divide ratio is 512. Please refer to
FCLKDIV Register”
Flash Clock Divider Register (FCLKDIV)
7
0
W
W
W
R
R
R
= Unimplemented or Reserved
PRDIV8
Bit 7
Figure 2-3. FTS256K2 Register Summary (continued)
0
0
0
6
0
Figure 2-4. Flash Clock Divider Register (FCLKDIV)
for more information.
.
= Unimplemented or Reserved
Table 2-4. FCLKDIV Field Descriptions
6
0
0
0
FDIV5
MC9S12E256 Data Sheet, Rev. 1.08
5
0
5
0
0
0
FDIV4
4
0
Description
4
0
0
0
.
FDIV3
3
0
Chapter 2 256 Kbyte Flash Module (FTS256K2V1)
3
0
0
0
FDIV2
2
0
2
0
0
0
Section 2.4.1.1, “Writing the
FDIV1
1
0
1
0
0
0
Bit 0
FDIV0
0
0
0
0
0
89