参数资料
型号: AT89EB5114-TGSIL
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: Low-pin-count 8-bit microcontroller with A/D converter
中文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDSO20
封装: SO-20
文件页数: 50/95页
文件大小: 1126K
代理商: AT89EB5114-TGSIL
50
4311A–8051–01/05
Table 36.
W1FL: PWMU1 frequency low control register
W1FL - PWMU1 Frequency Control Register (FBh)
Reset Value = 1111 1111b
Not bit addressable
Table 37.
W1CH: PWMU1 counter high control register
W1CH - PWMU1 Counter Control Register (FCh)
Reset Value = 0000 0000b
Not bit addressable
Table 38.
W1CL: PWMU1 counter low control register
W1CL - PWMU1 Counter Control Register (FDh)
Reset Value = 0000 0000b
Not bit addressable
PWMU1 Output
Generation
All the PWMU1 modules have the same frequency determined by the W1F registers.
However, each module has is own duty cycle determined by the W1Rn Registers. (n is
the module number).
When the W1C content is lower than the value programmed via W1Rn registers, the
output is the W1INVn-bit (low if 0, high if 1). When it is equal or higher, the output is the
opposite of this W1INVn-bit (high if 0, low if 1).
When the W1C content is higher than SW1F’s, an overtaking occurs. The counter value
(W1C registers) is automatically reloaded with zero (see Figure 21.). If the W1UP bit is
high, the new comparison value is reloaded on the shadow SW1R0 registers with the
7
6
5
4
3
2
1
0
W1F7
W1F6
W1F5
W1F4
W1F3
W1F2
W1F1
W1F0
Bit
Number
Bit
Mnemonic
Description
7-0
W1F7-0
PWMU1 low bits counter control frequency
The PWMU1 counter is counting from zero up to W1F15-0 value.
7
6
5
4
3
2
1
0
W1C15
W1C14
W1C13
W1C12
W1C11
W1C10
W1C9
W1C8
Bit
Number
Bit
Mnemonic
Description
7-0
W1C15-8
PWMU1 high bits counter frequency
7
6
5
4
3
2
1
0
W1C7
W1C6
W1C5
W1C4
W1C3
W1C2
W1C1
W1C0
Bit
Number
Bit
Mnemonic
Description
7-0
W1F7-0
PWMU1 low bits counter frequency
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