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9.2 U-TIMER Registers
9.2 U-TIMER Registers
The following three U-TIMER registers are used:
• U-TIMER (UTIM)
• Reload register (UTIMR)
• U-TIMER control register (UTIMC)
■
U-TIMER (UTIM)
The UTIM indicates the timer value. Access it using a 16-bit transfer instruction.
■
Reload register (UTIMR)
The UTIMR stores the value to be reloaded to the UTIM when the UTIM underflows.
Access it using a 16-bit transfer instruction.
■
U-TIMER Control Register (UTIMC)
The UTIMC controls the U-TIMER operation.
[bit 7] UCC1 (U-timer Count Control 1)
The UCC1 bit controls the U-TIMER counting method.
n: Value set in UTIMR
α
: Cycle of clock output to UART
15 14 210
UTIM
ch0 Address:0000 0078
H
b15 b14 b2 b1 b0
ch1 Address:0000 007C
H
ch2 Address:0000 0080
H
R
0
Access
initial value
15 14 210
UTIMR
ch0
Address:0000 0078
H
b15 b14 b2 b1 b0
ch1
Address:0000 007C
H
ch2
Address:0000 0080
H
W
0
initial value
Access
76543210
UTIMC
ch0 Address:0000 007B
H
UCC1 UTIE UNDR CLKS UTST UTCR
ch1 Address:0000 007F
H
ch2 Address:0000 0083
H
R/W R/W R/W R/W R/W R/W
0 00001
Access
Initial value
0 Normal operation.
α
= 2n+2 [initial value]
1 +1 mode
α
= 2n+3