Manual

262
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
24.5.3 BCRAMC Low Power Register
Register Name: BCRAMC_LPR
Access Type: Read/Write
• PAR: Partial Array Refresh
PAR restricts the refresh operation to a portion of the total memory array.
The table below gives an example of PAR but can change with the Cellular Ram provider
.
• TCR _TCSR: Temperature Compensated Refresh or Temperature Compensated Self-refresh
TCR or TCSR refresh the device in function of difference in temperature.
The table below gives an example of TCR or TCSR but can change with the Cellular Ram provider.
• LPCB: Low Power Command Bit
00: Low Power Feature is inhibited: Standby and Deep Power mode are not issued to the Cellular Ram device.
01: The Cellular Ram device Standby mode is enabled.
10: Deep Power Down mode is enabled.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
–––––– LPCB
76543210
– – TCR_TCSR – PAR
PAR Refresh Coverage
000 Full array
001 Bottom 1/2 array
010 Bottom 1/4 array
011 Bottom 1/8 array
100 None of 2 array
101 Top 1/2 array
110 Top 1/2 array
111 Top 1/2 array
TCR or TCSR Temperature
11 +85° C
00 Internal sensor or +70° C
01 +45° C
10 +15° C