CY8C27 Datasheet, PDF (162/332 Pages) –

13 Register Details
CY8C27xxx Preliminary Data Sheet
13.2.7 DxBxxOU
Digital Basic/Communications Type B Block Output Register
Individual Register Names and Addresses
DBB00OU : 1,22h
DBB10OU : 1,32h
DBB20OU : 1,42h
DBB30OU : 1,52h
DBB01OU : 1,26h
DBB11OU : 1,36h
DBB21OU : 1,46h
DBB31OU : 1,56h
Access : POR
Bit Name
7
6
RW : 0
AUXCLK
5
RW : 0
AUXEN
DCB02OU : 1,2Ah
DCB12OU : 1,3Ah
DCB22OU : 1,4Ah
DCB32OU : 1,5Ah
4
3
RW : 0
AUX IO Select[1:0]t
DCB03OU : 1,2Eh
DCB13OU : 1,3Eh
DCB23OU : 1,4Eh
DCB33OU : 1,5Eh
2
RW : 0
OUTEN
1
0
RW : 0
Output Select[1:0]
Before changing any of the configuration registers (DxBxxFN, DxBxxIN, and DxBxxOU), disable the corresponding digital
block by setting bit 0 in the CR0 or DxBxxCR0 register to 0. The values in this register should not be changed while the block
is enabled. After all configuration changes are made, enable the block by setting bit 0 in the DxBxxCR0 register to 1.
For additional information, reference the “Register Definitions” on page 209 in the Digital Blocks chapter.
Bit
[7:6]
Name
AUXCLK
[5]
AUXEN
[4:3] AUX IO Select[1:0]
[2]
OUTEN
(continued on next page)
Description
00b No sync
16 to 1 clock mux output
01b Synchronize to SYSCLK Output of 16 to 1 clock mux to SYSCLK
10b Synchronize to SYSCLKX2 Output of 16 to 1 clock mux to SYSCLKX2
11b SYSCLK
Directly connect SYSCLK to block clock input
Aux IO Enable (function dependent).
All Functions except SPI Slave: Enable Auxiliary Output Driver
0
Disabled
1
Enabled
SPI Slave: Slave Select Input
Aux IO Enable, Aux IO Select[1:0] (function dependent, SPIS only)
Source for SS_ input
000b AUXDATA[0] (Row Input 0)
001b AUXDATA[1] (Row Input 1)
010b AUXDATA[2] (Row input 2)
011b AUXDATA[3] (Row input 3)
100b Force SS_ active
101b Reserved
110b Reserved
111b Reserved
All Functions except SPI Slave: Row Output Select for Auxiliary Function Output (function dependent)
00b Row Output 0
01b Row Output 1
10b Row Output 2
11b Row Output 3
Enable Primary Function Output Driver
0
Disabled.
1
Enabled.
162
Document #: 38-12012 Rev. **
June 2, 2003