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ADP5589CP-EVALZ Datasheet(PDF) 42 Page - Analog Devices

Part No. ADP5589CP-EVALZ
Description  Keypad Decoder and I/O Expansion
Download  52 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADP5589CP-EVALZ Datasheet(HTML) 42 Page - Analog Devices

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ADP5589
Data Sheet
Rev. B | Page 42 of 52
Bits
Name
R/W
Description
[1:0]
RESET_PULSE_WIDTH[1:0]
R/W
Defines the pulse width of the reset signals.
Parameter common to both RESET1 and RESET2.
00 = 500 µs.
01 = 1 ms.
10 = 2 ms.
11 = 10 ms.
ADP5589AC_Z-00-R7, ADP5589AC_Z-02-R7 Default = 0000 0000
ADP5589AC_Z-01-R7 Default = 0010 0000
PWM_OFFT_LOW Register 0x3E
Table 70. PWM_OFFT_LOW Bit Descriptions
Bits
Name
R/W
Description
[7: 0]
PWM_OFFT_LOW_BYTE[7:0]
R/W
Lower eight bits of PWM off time.
PWM_OFFT_HIGH Register 0x3F
Table 71. PWM_OFFT_HIGH Bit Descriptions
Bits
Name
R/W
Description
[7: 0]
PWM_OFFT_HIGH_BYTE[7:0]
R/W
Upper eight bits of PWM off time.
PWM_ONT_LOW Register 0x40
Table 72. PWM_ONT_LOW Bit Descriptions
Bits
Name
R/W
Description
[7:0]
PWM_ONT_LOW_BYTE[7:0]
R/W
Lower eight bits of PWM on time.
PWM_ONT_HIGH Register 0x41
Table 73. PWM_ONT_HIGH Bit Descriptions
Bits
Name
R/W
Description
[7:0]
PWM_ONT_HIGH_BYTE[7:0]
R/W
Upper eight bits of PWM on time. Note that updated PWM times are not latched until this
byte is written to. PWM count times are referenced from the internal oscillator. The fastest
oscillator setting is 500 kHz (1 µs increments). Therefore, maximum on/off time is
1 µs × (216 −1) = 65.5 ms
This gives PWM frequencies from 500 kHz down to 7.6 Hz.
PWM_CFG Register 0x42
Table 74. PWM_CFG Bit Descriptions
Bits
Name
R/W
Description
[7:3]
Reserved.
2
PWM_IN_AND
R/W
AND the internally generated PWM signal with an externally supplied PWM signal (C6).
1
PWM_MODE
R/W
Defines PWM mode.
0 = continuous.
1 = one shot.
If a one-shot is performed, the PWM_EN bit is automatically cleared.
If a second one-shot must be performed, the user must set PWM_EN again.
0
PWM_EN
R/W
Enable PWM generator.


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