Cirrus Logic CDB6422 - Manual (Page 10)

CDB6422
10 DS295DB2
1. Saves the current state of the CS6422
register(s) bits to be changed in eeprom
2. Configures the CS6422 register(s) ac-
cording to the switch function
3.2.8 swu [1..9] - Switch Up
A. Notifies microcontroller that DIP
switch(es) 1..9 have been switched up (han-
dles multiple switches)
B. No MSG Stack pushes
C. Description:
Returns the CS6422 register(s) to the state
prior to the the respective 'swd' event
3.2.9 swp - Poll Dip Switches
A. Polls the DIP switches (assumes all
switches are down) and pushes “swu [1..8]”
onto the MSGStack to reflect the current
state of the DIP switches
B. No arguments accepted
3.2.10 off_hook - DAA Off Hook
A. Places DAA OFF-HOOK (enables net-
work connection)
B. No arguments accepted
C. No MSG Stack pushes
3.2.11 on_hook - DAA On Hook
A. Places DAA ON-HOOK (disconnects
the call)
B. No arguments accepted
C. No MSG Stack pushes
3.2.12 d_reset - DTMF Transceiver Reset
A. Resets the DTMF transceiver
B. No arguments accepted
C. No MSG Stack pushes
3.2.13 doff - DTMF Transmit Off
A. Stops transmission of any tone from the
DTMF transceiver (dual and single tones).
B. No arguments accepted
C. No MSG Stack pushes
3.2.14 dtmf [x] - DTMF Transmit On
A. Causes DTMF Transceiver to transmit
tone associated with a telephone key 'x'
B. No MSG Stack pushes
3.2.15 kd [0..e] - Keypad Down Event
A. Message indicating that key(s) [0..e] are
being pressed
B. Pushes to MSG Stack depending on
Keypad Mode (DTMF, LOAD, RECALL,
STORE)
3.2.16 ku [0..e] - Keypad Up Event
A. Message indicating that key(s) [0..e]
have been released
B. Pushes to MSG Stack depend on Keypad
Mode (DTMF, LOAD, RECALL, STORE)
3.2.17 st [x] - Single Tone Transmit On
A. Tells the DTMF transceiver to transmit
a single tone of frequency associated with
integer 'x' (see table below)
B. No pushes to MSG Stack
3.2.18 pd [1..4] - Push Button Down Event
A. Message indicating that push button(s)
[1..4] have been pressed
B. Pushes to MSG Stack are according to
button number:
Button 1 - 6422_RST - initiates a CS6422
reset
Button 2 - LOAD
1st push: next 4 'kd [x]' events will