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P89LPC921 Datasheet(PDF) 37 Page - NXP Semiconductors

No. de pieza P89LPC921
Descripción Electrónicos  8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM
PDF  45 Pages
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

P89LPC921 Datasheet(HTML) 37 Page - NXP Semiconductors

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Philips Semiconductors
P89LPC920/921/922
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 06 — 21 November 2003
37 of 45
9397 750 12285
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Fig 12. Shift register mode timing.
0
1
23
45
6
7
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
tXLXL
002aaa425
Set TI
Set RI
tXHQX
tQVXH
tXHDV
tXHDX
Clock
Output Data
Write to SBUF
Input Data
Clear RI
Fig 13. External clock timing.
tCHCL
tCLCX
tCHCX
tC
tCLCH
002aaa416
0.2 VDD + 0.9
0.2 VDD - 0.1 V
VDD - 0.5 V
0.45 V
Table 10:
AC characteristics, ISP entry mode
VDD = 2.4 V to 3.6 V, unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tVR
RST delay from VDD active
50
-
-
µs
tRH
RST HIGH time
1
-
32
µs
tRL
RST LOW time
1
-
-
µs
Fig 14. ISP entry waveform.
002aaa426
VDD
RST
tRL
tVR
tRH



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