参数资料
型号: DS87C550-QCL+
厂商: Maxim Integrated Products
文件页数: 32/49页
文件大小: 0K
描述: IC MCU EPROM ADC/PWM HS 68-PLCC
标准包装: 18
系列: 87C
核心处理器: 8051
芯体尺寸: 8-位
速度: 33MHz
连通性: EBI/EMI,SIO,UART/USART
外围设备: 电源故障复位,PWM,WDT
输入/输出数: 55
程序存储器容量: 8KB(8K x 8)
程序存储器类型: OTP
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
数据转换器: A/D 6x10b
振荡器型: 外部
工作温度: 0°C ~ 70°C
封装/外壳: 68-LCC(J 形引线)
包装: 管件
DS87C550 EPROM High-Speed Microcontroller with ADC and PWM
38 of 49
MOVX CHARACTERISTICS
VARIABLE CLOCK
PARAMETER
SYMBOL
MIN
MAX
UNITS
STRETCH
VALUES CST
(MD2:0)
Data Access ALE Pulse
Width
tLHLL2
0.375tMCS-5
0.5tMCS-5
1.5tMCS-10
ns
CST=0
1<=CST<=3
4<=CST<=7
Port 0 Address Valid to
ALE Low
tAVLL2
0.125tMCS-5
0.25tMCS-5
ns
CST=0
CST>0
Address Hold after
ALE Low for MOVX
Write
tLLAX2
0.125tMCS-5
0.25tMCS-5
1.25tMCS-10
ns
CST=0
1<=CST<=3
4<=CST<=7
RD
Pulse Width
tRLRH
0.5tMCS-5
CST*tMCS-10
ns
CST=0
1<=CST<=7
WR Pulse Width
tWLWH
0.5tMCS-5
CST*tMCS-10
ns
CST=0
1<=CST<=7
RD
Low to
Valid Data In
tRLDV
0.5tMCS-20
CST*tMCS-20
ns
CST=0
1<=CST<=7
Data Hold
after Read
tRHDX
0
ns
Data Float
after Read
tRHDZ
0.25tMCS-5
0.5tMCS-5
1.5tMCS-15
ns
CST=0
1<=CST<=3
4<=CST<=7
ALE Low to
Valid Data In
tLLDV
0.625tMCS-25
(CST+0.25)*tMCS-40
(CST+1.25)*tMCS-40
ns
CST=0
1<=CST<=3
4<=CST<=7
Port 0 Address
to Valid Data In
tAVDV1
0.75tMCS-40
(CST+0.5)*tMCS-27
(CST+1.5)*tMCS-20
ns
CST=0
1<=CST<=3
4<=CST<=7
Port 2 Address
to Valid Data In
tAVDV2
0.875tMCS-20
(CST+0.5)*tMCS-20
(CST+1.5)*tMCS-20
ns
CST=0
1<=CST<=3
4<=CST<=7
ALE Low to RD
or WR Low
tLLWL
0.125tMCS-10
0.25tMCS-10
1.25tMCS-10
0.125tMCS+5
0.25tMCS+5
1.25tMCS+10
ns
CST=0
1<=CST<=3
4<=CST<=7
Port 0 Address to RD
or WR Low
tAVWL1
0.25tMCS-12
0.5tMCS-12
2.5tMCS-12
ns
CST=0
1<=CST<=3
4<=CST<=7
Port 2 Address to RD
or WR Low
tAVWL2
0.25tMCS-12
0.5tMCS-12
2.5tMCS-12
ns
CST=0
1<=CST<=3
4<=CST<=7
Data Valid to
WR Transition
tQVWX
-5
ns
Data Hold
after Write
tWHQX
0.25tMCS-5
0.5tMCS-5
1.5tMCS-10
ns
CST=0
1<=CST<=3
4<=CST<=7
RD
Low to Address
Float
tRLAZ
-((0.125 tMCS)-5)
ns
RD
or WR High
to ALE High
tWHLH
-10
0.25tMCS-5
1.25tMCS-10
18
0.25tMCS+5
1.25tMCS+10
ns
CST=0
1<=CST<=3
4<=CST<=7
NOTES FOR MOVX CHARACTERISTICS USING STRETCH MEMORY CYCLES
§ tMCS is a time period related to the Stretch memory cycle selection. The following table shows the value of tMCS
for each Stretch selection.
§ CST is the stretch cycle value as determined by the MD2, MD1, & MD0 bits of the CKCON register.
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