SC26C198C1A PHILIPS [NXP Semiconductors], SC26C198C1A Datasheet - Page 27

• Manufacturer Part Number: SC26C198C1A
• Description: Octal UART with TTL compatibility at 3.3V and 5V supply voltages
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
clocking mechanism that will allow the pin to change synchronously
with an internal or external stimulus. See diagram below.
Table 39. GPOSR – General Purpose Output
GPOSR selects the signal or data source for the G
and Rx clock selection is straight forward. The selection of the
GPOR allows a more flexible timing control of when the G
changes.
Table 40. GPOR – General Purpose Output
This register is a read/write register. Its contents may be altered by
a GPOR Write or by the GPOC and GPOD registers shown below.
The GPOD and GPOC may be programmed to cause the individual
bits of the GPOR to change synchronously with internal or external
events. The cells of this register may be thought of as a “Two Port
flip-flop”; one port is controlled by a D input and clock, the other by a
data load strobe. A read of the GPOR always returns its current
value regardless of the port from which it was loaded.
1995 May 1
Reserved
Reserved
Octal UART with TTL compatibility at 3.3V
and 5V supply voltages
Bits 7:4
Bits 7:4
Select Register
Register
GPORON
GPOR(3)
4:1 MULTIPLEX
4:1 MULTIPLEX
1/O3a
1/O3b
NONE
G
Bit 3
G
IN
GPOD
IN
“1”
“0”
0
1
Global General Purpose Output 0 Selection
0000 – 0111 reserved
1000 = TxC1x a
1001 = TxC16x a
1010 = RxC16x a
1011 = TxC16x b
1100 = GGPOR(3)
1101 = GGPOR(2)
1110 = GGPOR(1)
1111 = GGPOR(0)
GPOR(2)
Bit 2
GPOR R/W
DATA BUS
Bits 3:0
GPOR(1)
Bit 1
Figure 1. General Purpose Pin Control Logic
DATA IN/OUT
DATA READ/WRITE
D INPUT
OUT
GPOR
D CLOCK
0 pin. The Tx
GPOR(0)
OUT
Bit 0
0 pin
QN
362
Table 41. GPOC – General Purpose Output Clk
This controls the clock source for GPOR that will clock and/or toggle
the data from the selected GPOD source. When code b’00 is
selected, no clock will be provided, thereby preventing any change
through the D port.
Table 42. GPOD – General Purpose Output Data
This register selects the data that will be presented to the GPOR “D”
input. Note that selection b’10 selects the inverted GPOR data as
the input. In this case, the GPOR output will toggle synchronously
with the clock selected in the GPOC.
Clk Sel
GPOR(3)
00 = none
01 = G
10 = G
11 = reserved
Data Sel
GPOR(3)
00 = ’1’
01 = ’0’
10 = GPOR3N
11 = reserved
Bits 7:6
Bits 7:6
IN
IN
TxC1Xa
TxC16Xa
RxC16Xa
TxC16Xb
GPOR(0)
GPOR(1)
GPOR(2)
GPOR(3)
0
1
Register
Register
8:1 MULTIPLEX
GPOSR
Clk Sel
GPOR(2)
00 = none
01 = G
10 = G
11 = reserved
Data Sel
GPOR(2)
00 = ’1’
01 = ’0’
10 = GPOR2N
11 = reserved
Bits 5:4
Bits 5:4
IN
IN
SC26C198 SC68C198
0
1
SC26L198 SC68L198
Clk Sel
GPOR(1)
00 = none
01 = G
10 = G
11 = I/O3c
Data Sel
GPOR(1)
00 = ’1’
01 = ’0’
10 = GPOR1N
11 = I/O3d
Bits 3:2
Bits 3:2
IN
IN
0
1
Product specification
GPO PIN
Clk Sel
GPOR(0)
00 = none
01 = G
10 = G
11 = I/O3a
Data Sel
GPOR(0)
00 = ’1’
01 = ’0’
10 = GPOR0N
11 = I/O3b
Bits 1:0
Bits 1:0
SD00526
IN
IN
0
1