P89LPC913FDH datasheet(51/63 Pages) PHILIPS

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Philips Semiconductors

P89LPC912/913/914

8-bit microcontrollers with two-clock 80C51 core

Product data

Rev. 03 — 17 December 2004

51 of 63

9397 750 14468

12. Dynamic characteristics

Table 14:

AC characteristics

VDD = 2.4 V to 3.6 V, unless otherwise speciﬁed.

Tamb = −40 °Cto+85 °C for industrial, unless otherwise speciﬁed.[1]

Symbol

Parameter

Conditions

Variable clock

fosc =12MHz

Unit

Min

Max

Min

Max

fRCOSC

internal RC oscillator frequency

(nominal f = 7.3728 MHz) trimmed

±1 % at Tamb =25 °C

7.189

7.557

7.189

7.557

MHz

fWDOSC

internal Watchdog oscillator

frequency (nominal f = 400 kHz)

320

520

320

520

kHz

Crystal oscillator (P89LPC912, P89LPC913)

fosc

oscillator frequency

MHz

tCLCL

clock cycle

see Figure 29

--ns

fCLKP

CLKLP active frequency

MHz

Glitch ﬁlter

glitch rejection, P1.5/RST pin

signal acceptance, P1.5/RST pin

125

glitch rejection, any pin except

P1.5/RST

signal acceptance, any pin except

P1.5/RST

External clock (P89LPC912, P89LPC913)

tCHCX

HIGH time

see Figure 29

tCLCL − tCLCX

tCLCX

LOW time

see Figure 29

tCLCL − tCHCX

tCLCH

rise time

see Figure 29

-8

tCHCL

fall time

see Figure 29

-8

Shift register (UART mode 0 - P89LPC913, P89LPC914)

tXLXL

serial port clock cycle time

see Figure 28

16 tCLCL

1333

tQVXH

output data set-up to clock rising

edge

see Figure 28

13 tCLCL

1083

tXHQX

output data hold after clock rising

edge

see Figure 28

-tCLCL + 20

103

tXHDX

input data hold after clock rising

edge

see Figure 28

-0

tDVXH

input data valid to clock rising edge see Figure 28

150

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