MCP2140A Microchip Technology, MCP2140A Datasheet - Page 6

• Manufacturer Part Number: MCP2140A
• Description: IrDA Standard Protocol Stack Controller With Fixed 9600 Baud Communication Rate
• Manufacturer: Microchip Technology

MCP2140A
TABLE 1-1:
DS22050A-page 6
RTS
V
OSC2
OSC1/CLKIN
CD
RXPD
Legend:
Note 1:
DD
Pin Name
TTL = TTL compatible input
A = Analog
CMOS = CMOS compatible input
I = Input
The state of the DSR output pin does not reflect the state of the DTR bit of the IrDA Primary Device.
PDIP
15
13
14
16
17
18
MCP2140A PIN DESCRIPTION NORMAL OPERATION (DCE) (CONTINUED)
Pin Number
SOIC SSOP
13
14
15
16
17
18
15, 16
14
17
18
19
20
Type
Pin
—
O
I
I
I
I
CMOS Oscillator crystal input/external clock source input.
Buffer
Type
ST = Schmitt Trigger input with CMOS levels
P = Power
OC = Open collector output
O = Output
TTL
ST
—
P
A
Request to Send. Indicates that a Host Controller is ready to
receive data from the MCP2140A. This signal is locally
emulated and not related to the CTS/RTS bit of the IrDA
Primary device.
1 = Host Controller not ready to receive data
0 = Host Controller ready to receive data
Positive supply for logic and I/O pins.
Oscillator crystal output.
Carrier Detect. The state of this bit is communicated to the
IrDA Primary device via the IrDA CD bit.
1 = No Carrier Present
0 = Carrier Present
IR RX Photo Detect Diode input. This input signal is required
to be a pulse to indicate an IR bit. When the amplitude of the
signal crosses the amplitude threshold set by the RXPDREF
pin, the IR bit is detected.
Description
© 2007 Microchip Technology Inc.