Manualshelf

SB16C1054_Data Sheet_EN

ManualsBrandsSystemBase ManualsElectronic ComponentsQuad UART with 256 Byte TX/RX FIFO, 80-pin TQFP - 119pcs Bundle
31323334353637383940
SB16C1054
QUAD UART WITH 256-BYTE FIFO
FEBRUARY 2009 REV 1.0
5
38
7.17 Page Select Register (PSR, Page 3)
If BFh is written in LCR, registers in Page3 and Page4 can be accessed. PSR is used to
determine which page to use. Table 19 shows PSR bit settings.
Table 19: Page Select Register Description
Bit Symbol Description
7:1 PSR[7:1]
Access Key.
When writing data on PSR to change page, Access Key must be
correspondent. If the value of PSR[7:1] is ‘1010_010’, data is
written on PSR[0] and page can be selected. If PSR[7:1] is read, it
reads ‘0000_000’ which is irrespective of Access Key.
0 PSR[0] Page Select.
0 : Page 3 is selected (default).
1 : Page 4 is selected.