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CAP1166 Arkusz danych(PDF) 21 Page - Microchip Technology

Numer części CAP1166
Szczegółowy opis  6 Channel Capacitive Touch Sensor with 6 LED Drivers
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Producent  MICROCHIP [Microchip Technology]
Strona internetowa  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

CAP1166 Arkusz danych(HTML) 21 Page - Microchip Technology

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 2015 Microchip Technology Inc.
DS00001621B-page 21
CAP1166
4.7
Bi-Directional SPI Protocols
4.7.1
RESET INTERFACE
Resets the Serial interface whenever two successive 7Ah codes are received. Regardless of the current phase of the
transaction - command or data, the receipt of the successive reset commands resets the Serial communication interface
only. All other functions are not affected by the reset operation.
4.7.2
SET ADDRESS POINTER
Sets the address pointer to the register to be accessed by a read or write command. This command overrides the auto-
incrementing of the address pointer.
FIGURE 4-8:
SPI Read Command - Normal Mode - Full
FIGURE 4-9:
SPI Reset Interface Command - Bi-directional Mode
Master SPDOUT
SPI_MOSI
Master Drives
Slave Drives
SPI_CLK
Read Command – 7Fh
SPI_CS#
Data at previously set register address = current
address pointer
SPI_MISO
‘0’
‘1’
‘1’
‘1’
‘1’
‘1’
‘1’
‘1’
Data at previously set register address = current
address pointer (SPI)
XXh
1. Register Read Address
updated to Current SPI Read
Address pointer
1. Register data loaded into
output buffer = data at current
address pointer
1. Output buffer transmitted =
data at previous address
pointer + 1 = current address
pointer
1. Register Read Address
incremented = current address
pointer + 1
1. SPI Read Address
Incremented = new current
address pointer
2. Register Read Address
Incremented = current address
pointer +1
Register Data loaded into
Output buffer = data at current
address pointer + 1
1. Output buffer transmitted =
data at current address pointer
+ 1
2. Flag set to increment SPI
Read Address at end of next 8
clocks
‘0’
‘1’
‘1’
‘1’
‘1’
‘1’
‘1’
‘1’
Data at previously set register address = current
address pointer (SPI)
1. Register data loaded into
output buffer = data at current
address pointer
1. Output buffer transmitted =
data at previous register
address pointer + 1 = current
address pointer
1. Output buffer transmitted =
data at current address pointer
+ 1
2. Flag set to increment SPI
Read Address at end of next 8
clocks
Subsequent Read Commands – 7Fh
1. Register Read Address
updated to Current SPI Read
Address pointer.
2. Register Read Address
incremented = current address
pointer +1 – end result =
register address pointer doesn’t
change
Master SPDOUT
SPI_MSIO
SPI_CS#
SPI_CLK
Reset - 7Ah
Reset - 7Ah
‘1’
‘1’
‘1’
‘1’
‘1’
‘0’
‘0’
‘0’
‘1’
‘1’
‘1’
‘1’
‘1’
‘0’
‘0’
‘0’


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