RX610 Group
19. Watchdog Timer (WDT)
R01UH0032EJ0120 Rev.1.20
Page 599 of 1006
Feb 20, 2013
19.2
Register Descriptions
Table 19.3 lists the registers of the WDT.
Table 19.3 WDT Registers
Register Name
Symbol
Value after Reset
Address
Access Size
Timer control/status register
TCSR
x8h
0008 8028h
*
1
8
Timer counter
TCNT
00h
0008 8029h
*
1
8
Reset control/status register
RSTCSR
1Fh
0008 802Bh
*
1
8
Write window A register
WINA
0008 8028h
*
2
16
Write window B register
WINB
0008 802Ah
*
2
16
Notes: 1. Read-only register
2. Write-only register
19.2.1
Timer Counter (TCNT)
Address: 0008 8029h
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
0
TCNT is an 8-bit up-counter for the internal clock.
TCNT is initialized to 00h when the TME bit in TCSR is set to 0.
To read this counter, use 8-bit access.
To write to this counter, write data to WINA in 16 bits.
For details, see section 19.5.1, Notes on Register Access.