MC9S12XD256VAG Freescale Semiconductor, MC9S12XD256VAG Datasheet - Page 321

• Manufacturer Part Number: MC9S12XD256VAG
• Description: IC MCU 256K FLASH 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12XD256VAG

• Core Processor: HCS12X
• Core Size: 16-Bit
• Speed: 80MHz
• Connectivity: CAN, EBI/EMI, I²C, IrDA, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 119
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 14K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 5.5 V
• Data Converters: A/D 24x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.3.2.5
Read: Anytime
Write: Has no meaning or effect
All bits reset to zero.
Freescale Semiconductor
TCNT[15:0]
Reset
Reset
Field
15:0
W
W
R
R
TCNT15
TCNT7
Timer Counter Bits — The 16-bit main timer is an up counter. A read to this register will return the current value
of the counter.
Note: A separate read/write for high byte and low byte in test mode will give a different result than accessing them
Timer Count Register (TCNT)
15
0
0
7
as a word. The period of the first count after a write to the TCNT registers may be a different size because
the write is not synchronized with the prescaler clock.
TCNT14
TCNT6
14
0
0
6
Access to the counter register will take place in one clock cycle.
Figure 7-7. Timer Count Register High (TCNT)
Figure 7-8. Timer Count Register Low (TCNT)
TCNT13
Table 7-6. TCNT Field Descriptions
TCNT5
MC9S12XDP512 Data Sheet, Rev. 2.21
13
0
0
5
TCNT12
TCNT4
12
0
0
4
Description
TCNT11
TCNT3
11
Chapter 7 Enhanced Capture Timer (S12ECT16B8CV2)
0
0
3
TCNT10
TCNT2
10
0
0
2
TCNT9
TCNT1
0
0
9
1
TCNT8
TCNT0
0
0
8
0
321