Fujitsu FR81S User Manual
CHAPTER 20: RELOAD TIMER
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : RELOAD TIMER
FUJITSU SEMICONDUCTOR CONFIDENTIAL
FUJITSU SEMICONDUCTOR CONFIDENTIAL
8
4.1. Control Status Register : TMCSR (TiMer Control and
Status Register)
The bit configuration of the control status register is shown below.
These registers control the operating mode and interrupt.
It is not possible to rewrite any data other than bit7 and bit3 to bit0 when bit1:CNTE=1.
It is possible to rewrite bit15-bit8 and bit6-bit4 and write counter operation enabling by writing CNTE=1
simultaneously. It is also possible to rewrite bit15-bit8, bit6-bit4 and write operation disabling by writing
CNTE=0 simultaneously.
It is not possible to rewrite any data other than bit7 and bit3 to bit0 when bit1:CNTE=1.
It is possible to rewrite bit15-bit8 and bit6-bit4 and write counter operation enabling by writing CNTE=1
simultaneously. It is also possible to rewrite bit15-bit8, bit6-bit4 and write operation disabling by writing
CNTE=0 simultaneously.
TMCSR : Address Base_addr + 06
H
(Access : Byte, Half-word, Word)
bit15
bit14
bit13
bit12
bit11
bit10
bit9
bit8
MOD[1:0]
TRGM[1:0]
CSL[2:0]
GATE
Initial value
0
0
0
0
0
0
0
0
Attribute
R,W
R,W
R,W
R,W
R,W
R,W
R,W
R,W
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
EF
Reserved
OUTL
RELD
INTE
UF
CNTE
TRG
Initial value
0
0
0
0
0
0
0
0
Attribute
R(RM1),W
R,W
R,W
R,W
R/W
R(RM1),W
R/W
R0,W
[bit15, bit14] MOD [1:0] (MODe) : Mode selection bits
MOD[1:0]
Operation mode
00
Single mode (initial value)
01
Dual mode
10
Compare mode
11
Capture mode
[bit13, bit12] TRGM[1:0] (TRiGger input Mode select) : TIN Input mode selection bits
These bits control input pin functions. The functions of the interval timer mode differ from those of the
event counter mode.
event counter mode.
[Interval timer mode, trigger input (bit8:GATE bit=0)]
Select an effective external edge which can be a reload trigger through TIN input in the following manner:
TRGM[1:0]
TIN effective external edge
00
No external trigger detection (initial value)
01
Rising edge
10
Falling edge
11
Both edges
MB91520 Series
MN705-00010-1v0-E
735