Instruction Manual

Register 15, Status Register
D3 D2 D1 D0
0 OSCR ERR DMOD
000
Register
Reset (R)
BIT NAME VALUE FUNCTION
OSCR Oscillator running
flag
0
1
Oscillator not running, using external clock input,
oscillator circuit is powered down.
Oscillator running, EXTCLK is an output, if enabled.
ERR Framing error flag 0
1
R No error
A framing error has occurred since the last read of
this bit. Resets after read
DMOD Detected
Modulation Type
0
1
R IrDA pulse style data format detected
Amplitude modulated carrier style data format
detected
To read this register, write 0000 to address 15. Independent of the setting of the ECHO bit, the CS8130
will transmit the above contents, with an address field of 1111.
Register 12, Output Pin Control Register
D3 D2 D1 D0
RXDT RXDH FORT FORH
0101
Register
Reset (R)
BIT NAME VALUE FUNCTION
RXDT RXD output pin
three-state enable
0
1
R In power down, RXD will go high or low.
In power down, RXD will float.
RXDH RXD output pin
high/low enable
0
1R
In power down, RXD will go low, if RXDT = 0
In power down, RXD will go high, if RXDT = 0
FORT FORM/BSY output
pin three-state
enable
0
1
R In power down, FORM/BSY will go high or low.
In power down, FORM/BSY will float.
FORH FORM/BSY output
pin high/low enable
0
1R
In power down, FORM/BSY will go low, if FORT = 0
In power down, FORM/BSY will go high, if FORT = 0
Register 13, Control Register #3
D3 D2 D1 D0
0 0 0 SHDW
0000
Register
Reset (R)
BIT NAME VALUE FUNCTION
SHDW Shadow register set
enable
0
1
R Enable access to registers 0 though 15
Enable access to shadow registers (16 through 31)
CS8130
18 DS134PP2
CS8130
18 DS134F1