msm9405 Oki Semiconductor, msm9405 Datasheet - Page 4

• Manufacturer Part Number: msm9405
• Description: Irda Communication Controller
• Manufacturer: Oki Semiconductor

¡ Semiconductor
*1 Either active high or active low can be selected depending on the register setting.
PIN DESCRIPTIONS
Transceiver
Module Interface
Microcontroller
Interface
DMA Controller
Interface
Others
Function
13-10
Pin
9-2
27
26
25
24
14
15
17
18
22
21
23
20
19
28
30
29
16
1
Symbol
IRIN-A
IRIN-B
IROUT
PWDN
RESET
D
DREQ
A
DACK
XOUT
INTR
TEST
GND
V
WR
XIN
RD
SD
0
0
CS
TC
-D
-A
DD
3
7
Type
I/O
—
—
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
Receive signal input B. (0.576 to 4 Mbps)
When connecting this device to a transceiver module,
tie this pin high or low if the number of the receive signal
output pins that the module has is only one.
Transmit signal output. Active high.
Transceiver module control signal output.
Becomes active when PWDN is set low.
This pin must be left open if connecting this device to a
transceiver module having no shutdown pins.
Data input-output.
Register address inputs.
Chip select input. Active low.
When low, read and write signals are enabled.
Read signal input. Active low.
Write signal input. Active low.
Interrupt request signal output. Active low.
DMA acknowledge signal input.
DMA transfer end signal input. Active low.
Power down control. Active low.
When set low, oscillation stops and the device enters power
down (low supply current) mode.
System reset input. Active low.
When set low, the internal registers are initialized.
Test. Must be left open.
Crystal connect.
Crystal connect.
Power supply.
Ground.
Receive signal input A. (2.4 kbps to 4 Mbps)
DMA Request signal output.
Description
*1
*1
*1
*1
*1
MSM9405
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