SB16C1054_Data Sheet_EN

SB16C1054
QUAD UART WITH 256-BYTE FIFO
FEBRUARY 2009 REV 1.0
5
25
Table 7: Internal Registers Map…continued
Address
A[2:0]
Register Read/Write Comments
Page 2 Registers
0h None — —
1h GICR : Global Interrupt Control Register Write-only LCR[7] = 0, MCR[6] = 1
2h GISR : Global Interrupt Status Register Read-only LCR[7] = 0, MCR[6] = 1
3h LCR : Line Control Register Read/Write —
4h MCR : Modem Control Register Read/Write LCR[7] = 0, MCR[6] = 0,
LCR[7] = 1, LCR ≠ BFh,
LCR[7] = 0, MCR[6] = 1
5h TCR : Transmit FIFO Count Register Read-only LCR[7] = 0, MCR[6] = 1
6h RCR : Receive FIFO Count Register Read-only LCR[7] = 0, MCR[6] = 1
7h FSR : Flow Control Status Register Read-only LCR[7] = 0, MCR[6] = 1
Page 3 Registers
0h PSR : Page Select Register Read/Write LCR = BFh, PSR[0] = 0,
LCR = BFh, PSR[0] = 1
1h ATR : Auto Toggle Control Register Read/Write LCR = BFh, PSR[0] = 0
2h EFR : Enhanced Feature Register Read/Write LCR = BFh, PSR[0] = 0
3h LCR : Line Control Register Read/Write —
4h XON1 : Xon1 Character Register Read/Write LCR = BFh, PSR[0] = 0
5h XON2 : Xon2 Character Register Read/Write LCR = BFh, PSR[0] = 0
6h XOFF1 : Xoff1 Character Register Read/Write LCR = BFh, PSR[0] = 0
7h XOFF2 : Xoff2 Character Register Read/Write LCR = BFh, PSR[0] = 0
Page 4 Registers
0h
PSR : Page Select Register Read/Write LCR = BFh, PSR[0] = 0,
LCR = BFh, PSR[0] = 1
1h AFR : Additional Feature Register Read/Write LCR = BFh, PSR[0] = 1
2h XRCR : Xoff Re-transmit Count Register Read/Write LCR = BFh, PSR[0] = 1
3h LCR : Line Control Register Read/Write —
4h TTR : Transmit FIFO Trigger Level Register Read/Write LCR = BFh, PSR[0] = 1
5h RTR : Receive FIFO Trigger Level Register Read/Write LCR = BFh, PSR[0] = 1
6h FUR : Flow Control Upper Threshold Register Read/Write LCR = BFh, PSR[0] = 1
7h FLR : Flow Control Lower Threshold Register Read/Write LCR = BFh, PSR[0] = 1