SB16C1058-TQFP128 IK Semicon Co., Ltd, SB16C1058-TQFP128 Datasheet - Page 45
SB16C1058-TQFP128
Manufacturer Part Number
SB16C1058-TQFP128
Description
Octal-uart Controller With 256-byte Fifo
Manufacturer
IK Semicon Co., Ltd
Datasheet
1.SB16C1058-TQFP128.pdf
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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 20 shows PSR bit settings.
3:2
1
0
Table 20:
Bit
7:1
0
FSR[0]
Symbol
PSR[7:1]
PSR[0]
FSR[3:2]
FSR[1]
Page Select Register Description
For more details, refer to ‘6.3 Software Flow Control’.
Not used, always ‘00’.
RX Hardware Flow Control Status.
For more details, refer to ‘6.2 Hardware Flow Control’.
RX Software Flow Control Status.
For more details, refer to ‘6.3 Software Flow Control’.
Description
Access Key.
Page Select.
OCTAL UART WITH 256-BYTE FIFO
0 : When FIFO or Auto-CTS flow control is disabled.
1 : If FIFO and Auto-CTS flow control is enabled, ‘1’ is
0 : When FIFO or RX Software flow control is disabled.
1 : If FIFO and RX Software flow control is enabled, it means
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 : Page 3 is selected (default).
1 : Page 4 is selected.
Xoff character has arrived and external device can not
receive data any more. This time characters in TX FIFO are
not transmitted.
character to report external device that it cannot receive
more data. If RX FIFO has space to store more data,
new data are stored in RX FIFO but after it gets full, they
are lost.
If FIFO and Auto-CTS flow control is enabled, ‘0’ is
inputted in NCTS pin and it means external device can
receive more data. This time data in TX FIFO are
transmitted.
inputted in NCTS pin and it means external device can
not receive more data. This time data in TX FIFO are not
transmitted.
If FIFO and RX Software flow control is enabled, it
means Xoff character has never arrived or Xon character
arrived after Xoff character had arrived(it means external
device can receive more data). This time data in TX FIFO
are transmitted.
IN16C1058
JUNE 2009
REV 1.0
45
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