u4091bm-r ATMEL Corporation, u4091bm-r Datasheet - Page 15

• Manufacturer Part Number: u4091bm-r
• Description: Programmable Telephone Audio Processor
• Manufacturer: ATMEL Corporation

Table 10-6.
10.1
11. Watchdog Function
4872A–CORD–08/05
Register
R14
R15
Power-on Reset
Names and Functions of the Serial Registers (Continued)
Group
TM
CLOR
CLOT
To avoid undefined states of the system when it is powered on, an internal reset clears the inter-
nal registers.
The system (U4091BM-R + microcontroller) is woken up by any of the following conditions:
The power-down of the circuit is caused by a shut-down sent by the serial bus (SD = 1), low-volt-
age reset, or by the watchdog function (see
Figure 12-4 on page
To avoid the system operating the microcontroller in a fault state, the circuit provides a watchdog
function. The watchdog has to be retriggered every second by triggering the serial bus (sending
information to the IC or other remote components at the serial bus). If there has been no bus
transmission for more than one second, the watchdog initiates a reset.
The watchdog provides a reset for the external microcontroller, but does not change the
U4091BM-R’s registers.
• VMP > 2.75V and VB > 2.95V
• and line voltage (VL)
• or ringer (VRING)
• or external supply (ES)
No.
R14B0
R14B1
R14B2
R14B3
R14B4
R14B5
R14B6
R14B7
R15B0
R15B1
R15B2
R15B3
R15B4
R15B5
R15B6
R15B7
Name
TME2
TME3
Reserved
CLOR0
CLOR1
CLOR2
CLOR3
CLOR4
Reserved
Reserved
Reserved
CLOT0
CLOT1
CLOT2
CLOT3
CLOT4
17).
Description
Test mode enable (high active)
Test mode enable (low active)
-
Adjustment for calculated receive log amp LSB
Adjustment for calculated receive log amp
Adjustment for calculated receive log amp
Adjustment for calculated receive log amp
Adjustment for calculated receive log amp MSB
-
-
-
Adjustment for calculated transmit log amp LSB
Adjustment for calculated transmit log amp
Adjustment for calculated transmit log amp
Adjustment for calculated transmit log amp
Adjustment for calculated transmit log amp MSB
Figure 12-2 on page
17,
Figure 12-3 on page 17
U4091BM-R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Status
and
15