upd6133 Renesas Electronics Corporation., upd6133 Datasheet - Page 17

• Manufacturer Part Number: upd6133
• Description: 4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
• Manufacturer: Renesas Electronics Corporation.

3.3 Control Register 0 (P3)
Control register 0 consists of 8 bits. The contents that can be controlled are as shown below.
When reset, the register becomes 0000 0011B.
b
b
b
b
Remark
0
2
3
4
, b
and b
1
: These bits specify the carrier frequency and duty ratio of the REM output.
: This bit specifies the availability of the carrier of the frequency specified by b
: This bit changes the carrier frequency and the timer clock’s frequency division ratio.
5
“0” = ON (with carrier); “1” = OFF (without carrier; high level)
“0” = 1/1 (carrier frequency: the specified value of b
“1” = 1/2 (carrier frequency: half of the specified value of b
: These bits specify the high-order 2 bits (DP
: don’t care
Bit
Name
Set
value
When reset
0
1
b
3
0
1
0
1
0
1
b
2
Table 3-5. Timer Clock and Carrier Frequency Setup
b
Fixed
to “0”
0
7
—
0
0
1
1
0
0
1
1
b
1
Table 3-4. Control Register 0 (P3)
b
Fixed
to “0”
0
6
—
0
1
0
1
0
1
0
1
b
Data Sheet U10454EJ6V0DS00
0
b
DP (Data pointer)
DP
0
1
0
5
9
f
f
X
X
/8
/16
Timer Clock
b
DP
0
1
0
4
8
8
and DP
0
b
TCTL
1/1
1/2
0
and b
3
9
Carrier Frequency (Duty Ratio)
) of ROM’s data pointer.
f
f
f
f
Without carrier (high level)
f
f
f
f
Without carrier (high level)
0
1
X
X
X
X
X
X
X
X
; timer clock: f
/8 (Duty 1/2)
/12 (Duty 1/2)
/12 (Duty 1/3)
/2 (Duty 1/2)
/16 (Duty 1/2)
/24 (Duty 1/2)
/24 (Duty 1/3)
and b
(Duty 1/2)
b
CARY
ON
OFF
0
2
1
; timer clock: f
b
MOD
Table 3-5.
1
Refer to
1
X
1
/8)
0
PD6133, 6134
b
MOD
1
and b
0
X
/16)
0
1
.
17