参数资料
型号: UPD62AMC-XXX-5A4-A
元件分类: 微控制器/微处理器
英文描述: 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20
封装: 0.300 INCH, PLASTIC, SSOP-20
文件页数: 9/62页
文件大小: 272K
代理商: UPD62AMC-XXX-5A4-A
17
PD62A
Data Sheet U14474EJ2V0DS00
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, this register becomes 0000 0011B.
Table 3-4. Control Register 0 (P3)
Bit
b7
b6
b5
b4
b3
b2
b1
b0
Name
DP (Data pointer) TCTL
CARY
MOD1
MOD0
DP9
DP8
Set
0
Fixed
0
1/1
ON
Refer to Table 3-5.
value
1
to 0
1
1/2
OFF
After reset
00000011
b0 and b1: These bits specify the carrier frequency and duty ratio of the REM output.
b2:
This bit specifies the availability of the carrier of the frequency specified by b0 and b1.
“0” = ON (with carrier); “1” = OFF (without carrier; high level)
b3:
This bit changes the carrier frequency and the timer clock’s frequency division ratio.
“0” = 1/1 (carrier frequency: the specified value of b0 and b1; timer clock: fX/64)
“1” = 1/2 (carrier frequency: half of the specified value of b0 and b1; timer clock: fX/128)
Table 3-5. Timer Clock and Carrier Frequency Settings
b3
b2
b1
b0
Timer Clock
Carrier Frequency (Duty Ratio)
0000fX/64
fX/8 (Duty 1/2)
01
fX/64 (Duty 1/2)
10
fX/96 (Duty 1/2)
11
fX/96 (Duty 1/3)
1
××
Without carrier (high level)
0000fX/128
fX/16 (Duty 1/2)
01
fX/128 (Duty 1/2)
10
fX/192 (Duty 1/2)
11
fX/192 (Duty 1/3)
1
××
Without carrier (high level)
b4 and b5: These bits specify the high-order 2 bits (DP8 and DP9) of the ROM data pointer.
Remark
×: don’t care
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