mcs7780 MosChip, mcs7780 Datasheet - Page 6

• Manufacturer Part Number: mcs7780
• Description: Usb 1.1 To Irda Port
• Manufacturer: MosChip

Page 6
MCS7780
USB 1.1 to IrDA Port
Mode Register: offset 0x00
SENDSIP
PLLPWD
CHGDIR
DRIVER
PARITY
RESET
SIPEN
BBTG
RATE
ASK
DTD
Name
FIR
SIR
DIR
[7:5] *
0 *
1 *
3 *
4 *
10
11
12
13
14
15
Bit
2
8
9
Reserved
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
* IR needs to be reset when this bit is changed.
Baud Rate
Default
0
0
1
0
1
1
0
1
0
1
0
1
1
0
1
2
3
4
5
6
7
1 = Puts the device in Fast Infrared mode (4MHz).
0 = Device uses SIR/MIR mode based on Baud Rate register.
1 = The SIR pulse width of 1.6 uS is used.
0 = The SIR pulse used is 3/16th of bit time.
1 = Enables back to back transmission with no inter packet gap.
Reserved
1 = Odd parity to be used by ASK.
0 = Even parity is used
Baud Rate selector. (See Table Below)
1 = Enable power down feature of the PLL
0 = power down feature of the PLL disabled.
1 = Upon initialization.
0 = Upon reset.
1 = Device determines the transfer direction automatically.
0 = The direction is controlled by software by writing a 1 (TX) or 0
1 = Transmit
0 = Receive
1 = Enables automatic hardware generation of SIP pulse.
0 = Disables the auto SIP generation.
On detecting a transition from low to high on this bit,
the device generates a SIP.
1 = Software is allowed to change the transfer direction by writing
0 = Direction change is not allowed.
0 = Resets the bridge and IR TOP modules.
Software should check the CHGDIR bit before writing to this bit.
The Device Driver sets this bit as the first step of initialization to
Software must generate it through Vendor Specific commands.
Software polls until this bit goes high before changing direction.
Invalid in SIR mode.
(RX) in DIR bit of this register
to DIR bit.
Frequency Selected
0.576 Mbps
1.152 Mbps
115.2 Kbps
19.2 Kbps
38.4 Kbps
57.6 Kbps
enable further access to the register set.
2.4 Kbps
9.6 Kbps
This bit is valid only when DTD = 0.
This bit is self clearing.
Description
Rev. 1.2