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12.2
Description of Registers
This section describes the configuration and functions of registers used by the
U-TIMER.
■ U-TIMER (UTIM: UTIM0 to UTIM2)
UTIM
ch0 address: 00000064
ch1 address: 0000006C
ch2 address: 00000074
UTIM is a register that indicates the timer value. Use a 16-bit transfer instruction to access this register.
■ Reload Register (UTIMR: UTIMR0 to UTIMR2)
UTIMR
ch0 address: 00000064
ch1 address: 0000006C
ch2 address: 00000074
UTIMR is a register that stores the value to be reloaded into UTIM if UTIM underflows.
Be sure to use a 16-bit transfer instruction to access this register.
■ U-TIMer Control Register (UTIMC: UTIMC0 to UTIMC2)
UTIMC
ch0 address: 00000067
ch1 address: 0000006F
ch2 address: 00000077
UTIMC controls the operation of the U-TIMER.
Be sure to use a byte transfer instruction to access this register.
[bit7] UCC1 (U-timer Count Control 1)
This bit controls the U-TIMER counting method.
UCC1
0
1
n: UTIMR set value
α: Cycle of the output clock for UART
CHAPTER 12 U-TIMER (16-bit Timer for UART Baud Rate Generation)
15
14
H
b15
b14
H
H
15
14
H
b15
b14
H
H
7
6
H
UCC1
–
H
R/W
–
H
0
–
Normal operation, α = 2n+2 [Initial value]
+1 mode α = 2n+3
2
b2
2
b2
5
4
3
2
UTIE UNDR CLKS UTST UTCR
–
–
R/W
R/W
R/W
0
0
0
–
Operation
1
0
b1
b0
← Access
R
← Initial value
0
1
0
b1
b0
← Access
W
← Initial value
0
1
0
← Access
R/W
R/W
← Initial value
0
1
299
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