at88sa100s ATMEL Corporation, at88sa100s Datasheet - Page 18

• Manufacturer Part Number: at88sa100s
• Description: Battery Authentication Chip
• Manufacturer: ATMEL Corporation

4.6.
5.
18
PauseLong
Forces the chip into a busy mode until the watchdog timer expires, after which it will automatically enter the sleep state.
During execution of this command the chip will ignore all activity on the IO signal. This command is used to prevent bus
conflicts in a system that also includes a CryptoAuthentication host chip sharing the same signal wire.
Table 19.
Table 20.
The Selector parameter provides a mechanism to select which device will pause if there are multiple devices on the
bus:
• If the Selector parameter is 0x00, then every chip receiving this command will go into the pause state and no chip will
• If any of the bits of the Selector parameter are set, then the chip will read the values of Fuse[84-87] and go to sleep
Pinout
There are three pins on the chip.
1
2
3
AT88SA100S [Preliminary]
Success
return a success code.
only if those fuse values match the least significant 4 bits of the Selector parameter. If the chip does NOT go into the
pause state, it returns an error code of 0x0F. Otherwise it goes into the pause state and never returns any code.
Pin #
Param1
Param2
Opode
Name
Data
Signal
V
V
Input Parameters
Output Parameter
CC
SS
Name
1
PAUSELONG
Selector
Ignored
IO channel to the system, open drain output. It is expected that an external pull-up resistor
will be provided to pull this signal up to V
in use this pin can be pulled to either V
Power supply, 2.5 – 5.5V. This pin should be bypassed with a high quality 0.1μF capacitor
close to this pin with a short trace to V
Connect to system ground.
Name
Zero
Size
If the command indicates that some other chip should go into the pause state, a
value of 0 will be returned by this AT88SA100S chip. If this chip goes into the
pause state no value will be returned.
Size
1
1
2
0
0x01
Which chip to put into the pause state, 0x00 for all chips
Must be 0x00 00
SS
CC
.
Description
CC
or V
for proper communications. When the chip is not
SS
.
Notes
Notes
8558B–SMEM–09/09