U-Timer Registers - Fujitsu MB91F109 FR30 Hardware Manual

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.
UTIM
ch0 Address:0000
ch1 Address:0000
ch2 Address:0000
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.
UTIMR
ch0
Address:0000
ch1
Address:0000
ch2
Address:0000
U-TIMER Control Register (UTIMC)
The UTIMC controls the U-TIMER operation.
U TI MC
ch 0 Ad dr es s: 0 0 0 0 0 0 7B
ch 1 Ad dr es s: 0 0 0 0 0 0 7F
ch 2 Ad dr es s: 0 0 0 0 0 0 83
[bit 7] UCC1 (U-timer Count Control 1)
The UCC1 bit controls the U-TIMER counting method.
n: Value set in UTIMR
: Cycle of clock output to UART
15
0078 b15 b14
H
007C
H
0080
H
15
0078 b15
H
007C
H
0080
H
7
UCC 1
H
H
R / W
H
0
0 Normal operation.
1 +1 mode
14
14
b14
6 5 4
U T IE U ND R CL K S UT S T U T C R
R / W R /W
0
= 2n+2 [initial value]
= 2n+3
9.2 U-TIMER Registers
2 1 0
b2 b1 b0
R
0
2 1 0
b2 b1 b0
W
0
3 2 1
R / W R /W R / W
0 0 0 1
Access
initial value
Access
initial value
0
Access
Initial value
241