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参数资料
| 型号： | M48T201Y-70MH6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO44 |
| 封装： | SNAPHAT, PLASTIC, SOH-44 |
| 文件页数： | 6/32页 |
| 文件大小： | 448K |
| 代理商： | M48T201Y-70MH6 |
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M48T201Y, M48T201V
14/32
WRITE Mode
The M48T201Y/V is in the WRITE Mode whenever
W (WRITE Enable) and E (Chip Enable) are low
state after the address inputs are stable. The start
of a WRITE is referenced from the latter occurring
falling edge of W or E. A WRITE is terminated by
the earlier rising edge of W or E. The addresses
must be held valid throughout the cycle. E or W
must return high for a minimum of tEHAX from Chip
Enable or tWHAX from WRITE Enable prior to the
initiation of another READ or WRITE Cycle. Data-
in must be valid tDVWH prior to the end of WRITE
and remain valid for tWHDX afterward. G should be
kept high during WRITE Cycles to avoid bus con-
tention; although, if the output bus has been acti-
vated by a low on E and G a low on W will disable
the outputs tWLQZ after W falls.
When
the
address value
presented to the
M48T201Y/V during the WRITE is in the range of
7FFFFh-7FFF0h, one of the on-board TIME-
KEEPER registers will be selected and data will
be written into the device. When the address value
presented to M48T201Y/V is outside the range of
TIMEKEEPER registers, an external SRAM loca-
tion is selected.
Figure 8. WRITE Cycle Timing: RTC & External RAM Control Signals
AI02336
GCON
W
DQ0-DQ7
G
ECON
DATA IN
VALID
ADDRESS
tAVAV
E
tAVEH
tAVAV
WRITE
READ
DATA OUT
VALID
DATA OUT
VALID
tAVWH
tAVQV
tWLWH
tWHDX
tWHAX
tWHQX
tEPD
tRO
tWLQZ
tDVWH
tGLQV
tEHQZ
tDVEH
DATA IN
VALID
tELEH
tEHAX
tAVEL
tEHDX
tAVWL
相关PDF资料 |
PDF描述 |
|---|---|
| M48T201Y-70MHTR | 1 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212V-70MH1 | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212V-70MH6TR | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212V-70MH6 | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212V-70MH1TR | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T201Y-80MH1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3 V TIMEKEEPER? supervisor |
| M48T201Y-80MH1E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3 V TIMEKEEPER? supervisor |
| M48T201Y-80MH1F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3 V TIMEKEEPER? supervisor |
| M48T201Y-80MH1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3 V TIMEKEEPER? supervisor |
| M48T201Y-85MH1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V TIMEKEEPER㈢ supervisor |
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