PC87109VBE Nuvoton Technology Corporation of America, PC87109VBE Datasheet - Page 42

• Manufacturer Part Number: PC87109VBE
• Description: IC CONTROLLER ADV UART 32-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of PC87109VBE

• Features: Transmit Deferral
• Number Of Channels: 2, DUART
• Fifo's: 16 Byte
• Voltage - Supply: 5V
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• Mounting Type: Surface Mount
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *PC87109VBE

B0
B1
B2-6
B7
3.8.5.2 IRCFG4 - Infrared Interface Configuration 4
This register is used to configure the receiver data path and enable the selection of the configuration pins.
After reset, the content of this register is 0.
B2-0
B3
B4
B5
Bits
Function
Reset State
Reserved.
Read/write 0’s.
IRSL1_DS - ID1/IRSL1 Pin’s Direction Select.
This bit determines the direction of the ID1/IRSL1 pin.
0 => Pin’s direction is input.
1 => Pin’s direction is output.
RXINV - IRRX Signal Invert.
This bit is provided in order to support optical transceivers with receive signals of opposite polarity (active
high instead of active low).
When set to 1, an inverter is placed on the receiver input signal path.
IRSL0_DS - ID0/IRSL0/IRRX2 Pin Direction Select.
This bit determines the direction of the ID0/IRSL0/IRRX2 pin.
IRIC0 - Transceiver Identification/Control.
The function of this bit depends on whether the ID0/IRSL0/IRRX2 pin is programmed as input or as an output.
ID0/IRSL0/IRRX2 Pin Programmed as Input (IRSL0_DS = 0).
ID0/IRSL0/IRRX2 Pin Programmed as Output (IRSL0_DS = 1).
IRIC1 - Transceiver Identification/Control
The function of this bit depends on whether the ID1/IRS1 pin is programmed as input or as output.
ID1/IRSL1 Pin Programmed as Input (IRSL1_DS = 0).
ID1/IRSL1 Pin Programmed as Output (IRSL1_DS = 1).
Reserved.
Read/Write as 0.
STRV_MS - Special Transceiver Mode Select.
This bit is used to select the operational mode in some optical transceiver modules. When this bit is set to 1, the IRTX
output is forced high and a timer is started.
The timer times out after approximately 64 us, at which time the bit is reset and IRTX returns low. The timer is
restarted every time a 1 is written into this bit position. Therefore, the time in which IRTX is forced high can be
extended beyond 64 us.
This should be avoided, however, to prevent damage to the transmitter LED.
Writing 0 into this bit position has no effect.
0 => Pin’s direction is input.
1 => Pin’s direction is output.
Upon read, this bit returns the logic level of the pin.
Data written into this bit position is ignored.
This bit will drive the ID0/IRSL0/IRRX2 pin regardless of the selected mode.
Upon read, this bit returns the value previously written.
Upon read, this bit returns the logic level of the pin.
Data written into this bit position is ignored.
This bit will drive the ID1/IRSL1 pin regardless of the selected mode.
Upon read, this bit returns the value previously written.
B7
res
0
IRRX_MD
B6
0
Figure 3-27. Infrared Configuration Register 4
IRSL0_DS
B5
0
RXINV
42
B4
0
IRSL1_DS
B3
0
B2
res
0
B1
res
0
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res
B0
0