Cypress MicroSystems CY8C25122/CY8C26233/CY8C26443/CY8C26643 Family Data Sheet
50
Document #: 38-12010 CY Rev. ** CMS Rev. 3.20
September 5, 2002
Digital Basic Type A Block 00 Function Register
(DBA00FN, Address = Bank 1, 20h)
Digital Basic Type A Block 01 Function Register
(DBA01FN, Address = Bank 1, 24h)
Digital Basic Type A Block 02 Function Register
(DBA02FN, Address = Bank 1, 28h)
Digital Basic Type A Block 03 Function Register
(DBA03FN, Address = Bank 1, 2Ch)
Digital Communications Type A Block 04 Function Register
(DCA04FN, Address = Bank 1, 30h)
Table 47:
Digital Basic Type A/ Communications Type A Block xx Function Register
Bit #
7
6
5
4
3
2
1
0
POR
0
0
0
0
0
0
0
0
Read/Write
RW
RW
RW
RW
RW
RW
RW
RW
Bit Name
Reserved
Reserved End
Mode 1
Mode 0
Function [2]
Function [1]
Function [0]
Bit 7
: Reserved
Bit 6
: Reserved
Bit 5
: End
0 = PSoC block is not the end of a chained function (End should not be set to 0 in block DCA07)
1 = PSoC block is the end of a chained function, or is an unchained PSoC block
Bit 4
: Mode 1 The definition of the Mode [1] bit depends on the block function selected
Timer: The Mode [1] bit signifies the Compare Type
0 = Less Than or Equal
1 = Less Than
Counter: The Mode [1] bit signifies the Compare Type
0 = Less Than or Equal
1 = Less Than
CRC/PRS: The Mode [1] bit is unused in this function
Deadband: The Mode [1] bit is unused in this function
UART: The Mode[1] bit signifies the Interrupt Type (Transmitter only)
0 = Transmit: Interrupt on TX_Reg Empty
1 = Transmit: Interrupt on TX Complete
SPI: The Mode[1] bit signifies the Interrupt Type
0 = Master: Interrupt on TX Reg Empty, Slave: Interrupt on RX Reg Full
1 = Master: Interrupt on SPI Complete, Slave: Interrupt on SPI Complete
Bit 3
: Mode 0 The definition of the Mode [0] bit depends on the block function selected
Timer: The Mode [0] bit signifies Interrupt Type
0 = Terminal Count
1 = Compare True
Counter: The Mode [0] bit signifies Interrupt Type
0 = Terminal Count
1 = Compare True
CRC/PRS: The Mode [0] bit is unused in this function
Deadband: The Mode [0] bit is unused in this function
UART: The Mode [0] bit signifies the Direction
0 = Receive
1 = Transmit
SPI: The Mode [0] bit signifies the Type
0 = Master
1 = Slave
Bit [2:0]
: Function [2:0] The Function [2:0] bits select the block function which determines the basic hardware configuration
0 0 0 = Timer (chainable)
0 0 1 = Counter (chainable)
0 1 0 = CRC/PRS (Cyclical Redundancy Checker or Pseudo Random Sequencer) (chainable)
0 1 1 = Reserved
1 0 0 = Deadband for Pulse Width Modulator
1 0 1 = UART (function only available on DCA type blocks)
1 1 0 = SPI (function only available on DCA type blocks)
1 1 1 = Reserved
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