參數(shù)資料
型號(hào)： M34552M8H-XXXFP
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48
封裝： 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù)： 106/143頁
文件大小： 0K
代理商： M34552M8H-XXXFP
7: A.C. CHARACTERISTICS
S1D13505F00A HARDWARE FUNCTIONAL
EPSON
1-53
SPECIFICATION (X23A-A-001-12)
FPM-DRAM CAS Before RAS Refresh Timing
Figure 7-20 FPM-DRAM CAS before RAS Refresh Timing
Table 7-19 FPM-DRAM CAS before RAS Refresh Timing
Symbol
Parameter
Min.
Max.
Units
t1
Internal memory clock period
40
ns
t2
RAS# precharge time (REG[22h] bits 3-2 = 00)
2.45 t1 - 3
ns
RAS# precharge time (REG[22h] bits 3-2 = 01 or 10)
1.45 t1 - 3
ns
t3
RAS# pulse width (REG[22h] bits 6-5 = 00 and bits 3-2 = 00)
2.45 t1 - 3
ns
RAS# pulse width (REG[22h] bits 6-5 = 00 and bits 3-2 = 01 or 10)
3.45 t1 - 3
ns
RAS# pulse width (REG[22h] bits 6-5 = 01 and bits 3-2 = 00)
1.45 t1 - 3
ns
RAS# pulse width (REG[22h] bits 6-5 = 01 and bits 3-2 = 01 or 10)
2.45 t1 - 3
ns
RAS# pulse width (REG[22h] bits 6-5 = 10 and bits 3-2 = 00)
0.45 t1 - 3
ns
RAS# pulse width (REG[22h] bits 6-5 = 10 and bits 3-2 = 01 or 10)
1.45 t1 - 3
ns
t4
CAS# pulse width (REG[22h] bits 3-2 = 00)
2 t1 - 3
ns
CAS# pulse width (REG[22h] bits 3-2 = 01 or 10)
1 t1 - 3
ns
t5
CAS# Setup to RAS#
0.45 t1 - 3
ns
t6
CAS# Hold to RAS# (REG[22h] bits 6-5 = 00 and bits 3-2 = 00)
2.45 t1 - 3
ns
CAS# Hold to RAS# (REG[22h] bits 6-5 = 00 and bits 3-2 = 01 or 10)
3.45 t1 - 3
ns
CAS# Hold to RAS# (REG[22h] bits 6-5 = 01 and bits 3-2 = 00)
1.45 t1 - 3
ns
CAS# Hold to RAS# (REG[22h] bits 6-5 = 01 and bits 3-2 = 01 or 10)
2.45 t1 - 3
ns
CAS# Hold to RAS# (REG[22h] bits 6-5 = 10 and bits 3-2 = 00)
0.45 t1 - 3
ns
CAS# Hold to RAS# (REG[22h] bits 6-5 = 10 and bits 3-2 = 01 or 10)
1.45 t1 - 3
ns
RAS#
CAS#
t2
t3
t1
Memory
Clock
t4
t5
t6
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