HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 255

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11.1.4
Table 11.2 lists information on the watchdog timer registers.
Table 11.2 Register Configuration
Name
Timer control/status register
Timer counter
Note: * Software can write a 0 to clear the status flag bits, but cannot write 1.
11.2
11.2.1
TCNT is an 8-bit readable/writable up-counter. When the timer enable bit (TME) in the timer
control/status register (TCSR) is set to 1, the timer counter starts counting pulses of an internal
clock source selected by clock select bits 2 to 0 (CKS2 to CKS0) in TCSR. When the count
overflows (changes from H'FF to H'00), an overflow flag (OVF) in TCSR is set to 1.
TCNT is initialized to H'00 by a reset and when the TME bit is cleared to 0.
Note: TCNT is more difficult to write to than other registers. See Section 11.2.4, Register
Bit
Initial value
Read/Write
Access, for details.
Register Configuration
Register Descriptions
Timer Counter (TCNT)
R/W
7
0
R/W
6
0
Abbreviation
TCSR
TCNT
R/W
5
0
R/W
R/W
R/(W)*
R/W
4
0
R/W
3
0
Initial
Value
H'10
H'00
R/W
2
0
Write
H'FFA8
H'FFA8
Addresses
R/W
1
0
Read
H'FFA8
H'FFA9
R/W
0
0
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