DS87C550-QNL Maxim Integrated Products, DS87C550-QNL Datasheet - Page 39

• Manufacturer Part Number: DS87C550-QNL
• Description: IC MCU EPROM ADC/PWM HS 68-PLCC
• Manufacturer: Maxim Integrated Products
• Series: 87Cr

Specifications of DS87C550-QNL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, SIO, UART/USART
• Peripherals: Power-Fail Reset, PWM, WDT
• Number Of I /o: 55
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 68-LCC, 68-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

t
EXTERNAL CLOCK CHARACTERISTICS
SERIAL PORT MODE 0 TIMING CHARACTERISTICS
RD
MCS
PARAMETER
Clock High Time
Clock Low Time
Clock Rise Time
Clock Fall Time
PARAMETER
Serial Port Clock Cycle Time
Output Data Setup to Clock Rising
Output Data Hold from Clock Rising
Input Data Hold from Clock Rising
Clock Rising Edge to Input Data Valid
SM2=0, 12 clocks per cycle
SM2=1, 4 clocks per cycle
SM2=0, 12 clocks per cycle
SM2=1, 4 clocks per cycle
SM2=0, 12 clocks per cycle
SM2=1, 4 clocks per cycle
SM2=0, 12 clocks per cycle
SM2=1, 4 clocks per cycle
SM2=0, 12 clocks per cycle
SM2=1, 4 clocks per cycle
MD2
4X/
4X/
4X/
4X/
,
System Clock Selection
TIME PERIODS
0
0
0
0
1
1
1
1
WR
2X
2X
2X
2X
, CD1, CD0 = 100
, CD1, CD0 = 000
, CD1, CD0 = x10
, CD1, CD0 = x11
PULSE WIDTH WITH STRETCH CYCLES
MD1
0
0
1
1
0
0
1
1
MD0
0
1
0
1
0
1
0
1
1024 t
SYMBOL
1 t
2 t
4 t
t
t
t
t
MCS
t
Machine
SYMBOL
CHCX
CLCL
CLCL
CLCL
CLCX
CLCL
CHCL
MOVX
Cycles
CLCL
t
t
t
t
t
QVXH
XHQX
XHDX
XHDV
10
11
12
XLXL
2
3
4
5
9
39 of 49
CD1:0=00
4X/
MIN
0.5 t
2 t
3 t
4 t
5 t
6 t
7 t
10
10
MIN
t
RD
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
2X
CLCL
,
=1
WR
12t
12t
12t
12t
12t
TYP
4t
4t
4t
4t
4t
Pulse Width (in oscillator clocks)
CD1:0=00
TYP
4X/
10 t
12 t
14 t
CLCL
CLCL
CLCL
CLCL
CLCL
1 t
2 t
4 t
6 t
8 t
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
2X
CLCL
CLCL
CLCL
=0
MAX
MAX
5
5
CD1:0=10
4X/
12 t
16 t
20 t
24 t
28 t
2 t
4 t
8 t
CLCL
CLCL
CLCL
2X
CLCL
CLCL
CLCL
CLCL
CLCL
UNITS
UNITS
=x
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CD1:0=11
4X/
2048 t
4096 t
8192 t
12288 t
16384 t
20480 t
24576 t
28672 t
NOTES
NOTES
2X
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
=x