参数资料
型号: M48T59Y-70MH1F
厂商: STMICROELECTRONICS
元件分类: 时钟/数据恢复及定时提取
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDSO28
封装: 0.330 INCH, LEAD FREE, PLASTIC, SOH-28
文件页数: 2/32页
文件大小: 373K
代理商: M48T59Y-70MH1F
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
Operation modes
M48T59, M48T59Y, M48T59V
2.2
Write mode
The M48T59/Y/V is in the WRITE Mode whenever W and E are low. 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 contention; however, if the output bus has been activated by a
low on E and G a low on W will disable the outputs tWLQZ after W falls.
Figure 6.
Write enable controlled, write mode AC waveforms
Figure 7.
Chip enable controlled, write mode AC waveforms
AI01386
tAVAV
tWHAX
tDVWH
DATA INPUT
A0-A12
E
W
DQ0-DQ7
VALID
tAVWH
tAVEL
tWLWH
tAVWL
tWLQZ
tWHDX
tWHQX
AI01387B
tAVAV
tEHAX
tDVEH
A0-A12
E
W
DQ0-DQ7
VALID
tAVEH
tAVEL
tAVWL
tELEH
tEHDX
DATA INPUT
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