SC28L194A1A NXP Semiconductors, SC28L194A1A Datasheet - Page 29

• Manufacturer Part Number: SC28L194A1A
• Description: UART Interface IC 3V-5V 4CH UART INTEL/MOT INTRF
• Manufacturer: NXP Semiconductors
• Type: Quad UART for 3.3 V and 5 V supply voltager

Specifications of SC28L194A1A

• Number Of Channels: 4
• Data Rate: 460.8 Kbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• Supply Current: 30 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: PLCC-68
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V, 5 V
• Lead Free Status / Rohs Status: Details
• Other names: SC28L194A1A,512

Philips Semiconductors
GENERAL PURPOSE OUTPUT PIN CONTROL
The following four registers control the function of the Gout0 and
Gout1 pins. These output pins have a unique control matrix which
includes a 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 Gout pins. The Tx
and Rx clock selection is straight forward. The selection of the
GPOR allows a more flexible timing control of when the Gout pins
change.
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.
2006 Aug 15
Global General Purpose Output
1
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)
Reserved
Quad UART for 3.3 V and 5 V supply voltage
Bits 7:4
Select Register
Register
Bits 7:4
GPORQN
GPOR(3)
4:1 MULTIPLEX
4:1 MULTIPLEX
1/O3a
1/O3b
NONE
G
Bit 3
G
GPOD
IN
IN
“1”
“0”
GPOC
0
1
GPOR(2)
Bit 2
4
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)
DATA BUS 3:0
GPOR R/W
4
GPOR(1)
Bit 1
Bits 3:0
Figure 3. General Purpose Pin Control Logic
DATA IN/OUT
DATA READ/WRITE
D INPUT
D CLOCK
GPOR
GPOR(0)
Bit 0
QN
29
RxC16Xa
TxC16Xa
TxC16Xb
4
TxC1Xa
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 = GIN0
10 = GIN1
11 = reserved
Data Sel
GPOR(3)
00 = ’1’
01 = ’0’
10 = GPOR3N
11 = reserved
Bits 7:6
Bits 7:6
GPOR(0)
GPOR(1)
GPOR(2)
GPOR(3)
Register
Register
8:1 MULTIPLEX
GPOSR
Clk Sel
GPOR(2)
00 = none
01 = GIN0
10 = GIN1
11 = reserved
Data Sel
GPOR(2)
00 = ’1’
01 = ’0’
10 = GPOR2N
11 = reserved
Bits 5:4
Bits 5:4
Clk Sel
GPOR(1)
00 = none
01 = GIN0
10 = GIN1
11 = I/O3c
Data Sel
GPOR(1)
00 = ’1’
01 = ’0’
10 = GPOR1N
11 = I/O3d
Bits 3:2
Bits 3:2
SC28L194
GPO PIN
Product data sheet
SD00526
Clk Sel
GPOR(0)
00 = none
01 = GIN0
10 = GIN1
11 = I/O3a
Data Sel
GPOR(0)
00 = ’1’
01 = ’0’
10 = GPOR0N
11 = I/O3b
Bits 1:0
Bits 1:0