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87C552 Datasheet(PDF) 17 Page - NXP Semiconductors

Part # 87C552
Description  80C51 8-bit microcontroller 8K/256 OTP, 8 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

87C552 Datasheet(HTML) 17 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
87C552
80C51 8-bit microcontroller
8K/256 OTP, 8 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O
1998 May 01
17
VDD
P0
EA
RST
XTAL1
XTAL2
VSS
VDD
VDD
IDD
(NC)
CLOCK SIGNAL
VDD
P1.6
P1.7
STADC
EW
AVSS
AVref–
SU00219
Figure 12. IDD Test Condition, Idle Mode
All other pins are disconnected2
2. Idle Mode:
a. The following pins must be forced to VDD: Port 0 and EW.
b. The following pins must be forced to VSS: RST, STADC, AVss,, AVref–, and EA.
c. Ports 1.6 and 1.7 should be connected to VDD through resistors of sufficiently high value such that the sink current into these pins cannot
exceed the IOL1 spec of these pins. These pins must not have logic 0 written to them prior to this measurement.
d. The following pins must be disconnected: XTAL2 and all pins not specified above.
VDD–0.5
0.5V
0.7VDD
0.2VDD–0.1
tCHCL
tCLCL
tCLCH
tCLCX
tCHCX
SU00220
Figure 13. Clock Signal Waveform for IDD Tests in Active and Idle Modes
tCLCH = tCHCL = 5ns
VDD
P0
RST
XTAL1
XTAL2
VSS
VDD
VDD
IDD
(NC)
VDD
P1.6
P1.7
STADC
EA
EW
AVSS
AVref–
SU00221
Figure 14. IDD Test Condition, Power Down Mode
All other pins are disconnected. VDD = 2V to 5.5V3
3. Power Down Mode:
a. The following pins must be forced to VDD: Port 0 and EW.
b. The following pins must be forced to VSS: RST, STADC, XTAL1, AVss,, AVref–, and EA.
c. Ports 1.6 and 1.7 should be connected to VDD through resistors of sufficiently high value such that the sink current into these pins cannot
exceed the IOL1 spec of these pins. These pins must not have logic 0 written to them prior to this measurement.
d. The following pins must be disconnected: XTAL2 and all pins not specified above.


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