upd17225 Renesas Electronics Corporation., upd17225 Datasheet - Page 32

• Manufacturer Part Number: upd17225
• Description: 4-bit Single-chip Microcontroller For Small General-purpose Infrared Remote Control Transmitter
• Manufacturer: Renesas Electronics Corporation.

NRZLTMM
NRZHTMM
32
5.2
Notes 1. When the STOP mode is released, bit 3 must be set.
7
7
0
TMEN
Function of 8-bit Timer (with modulo function)
3
2. Bit 2 is a write-only bit.
6
6
TMRES
5
5
7-bit modulo register
7-bit modulo register
2
4
4
TMCK1
3
3
1
2
2
TMCK0
1
1
0
0
0
Data Sheet U12643EJ2V0DS00
Value indicated by parentheses is for when
( ): f
Bit 7
Fixed to 0
TMRES
TMCK1
RF : 33H
TMEN
Address
Bit 7
SYS
0
1
0
1
0
1
0
0
1
1
Peripheral register: 03H
Peripheral register: 04H
(system clock) = f
8-Bit Timer Reset Flag
Data read out is always "0"
Resets 8-bit counter and IRQTM
8-Bit Timer Count Enable Flag
Stops 8-bit timer count operation
Enable 8-bit timer count operation (falling edge)
Output Control of REM Pin
When NRZ = 1, carrier output to REM pin
When NRZ = 1, high-level output to REM pin
TMCK0
Address
Address
On reset
0
1
0
1
8H
Note 1
Count clock: f
(Measurement time range: 8 s to 2.048 ms)
Count clock: f
(Measurement time range: 16 s to 4.096 ms)
Count clock : f
(Measurement time range: 64 s to 16.384 ms)
Remote control carrier generation circuit output
X
= 4MHz
PD17225, 17226, 17227, 17228
8-Bit Timer Clock Source Selection
R/W
R/W
Note 2
X
X
X
/32
/64
/256
Undefined
Undefined
On reset
On reset
R/W
R/W
R/W
R/W