s71ws256jc0 Meet Spansion Inc., s71ws256jc0 Datasheet - Page 180

• Manufacturer Part Number: s71ws256jc0
• Description: Stacked Multi-chip Product Mcp 128/64 Megabit 8m/4m X 16-bit Cmos 1.8 Volt-only, Simultaneous Read/write, Burst Mode Flash Memory With Cellularram
• Manufacturer: Meet Spansion Inc.

39.5 Temperature Compensated Refresh (CR[6:5]) Default = On-Chip
39.6 Page Mode READ Operation (CR[7]) Default = Disabled
August 25, 2005 CellRAM_05_A0
Temperature Sensor
This CellularRAM device includes an on-chip temperature sensor that automatically adjusts the
refresh rate according to the operating temperature. The on-chip TCR is enabled by clearing both
of the TCR bits in the refresh configuration register (CR[6:5] = 00b). Any other TCR setting en-
ables a fixed refresh rate. When the on-chip temperature sensor is enabled, the device continually
adjusts the refresh rate according to the operating temperature.
The TCR bits also allow for adequate fixed-rate refresh at three different temperature thresholds
(+15° C, +45° C, and +85° C). The setting selected must be for a temperature higher than the
case temperature of the CellularRAM device. If the case temperature is +35° C, the system can
minimize self-refresh current consumption by selecting the +45° C setting. The +15° C setting
may result in inadequate refreshing and cause data corruption.
The page mode operation bit determines whether page mode READ operations are enabled. In
the power-up default state, page mode is disabled.
CR[2]
CR[2]
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A d v a n c e
CR[1]
CR[1]
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Table 39.1 32-Mb Address Patterns for PAR (CR[4] = 1)
Table 39.2 16-Mb Address Patterns for PAR (CR[4] = 1)
CR[0]
CR[0]
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Aysnc/Page CellularRAM Type 2
I n f o r m a t i o n
One-quarter of die
One-quarter of die
One-quarter of die
One-quarter of die
One-eighth of die
One-eighth of die
One-eighth of die
One-eighth of die
Active Section
Active Section
One-half of die
One-half of die
One-half of die
One-half of die
None of die
None of die
Full die
Full die
000000h–1FFFFFh
000000h–0FFFFFh
000000h–07FFFFh
000000h–03FFFFh
100000h–1FFFFFh
180000h–1FFFFFh
1C0000h–1FFFFFh
Address Space
Address Space
00000h–FFFFFh
00000h–7FFFFh
00000h–3FFFFh
00000h–1FFFFh
80000h–FFFFFh
C0000h–FFFFFh
E0000h–FFFFFh
0
0
2 Meg x 16
1 Meg x 16
0 Meg x 16
1 Meg x 16
1 Meg x 16
0 Meg x 16
512K x 16
256K x 16
512K x 16
256K x 16
512K x 16
256K x 16
128K x 16
512K x 16
256K x 16
128K x 16
Size
Size
Density
Density
32Mb
16Mb
16Mb
16Mb
8Mb
4Mb
0Mb
8Mb
4Mb
8Mb
4Mb
2Mb
0Mb
8Mb
4Mb
2Mb
179