P89LPC924 Philips Semiconductors, P89LPC924 Datasheet - Page 43

• Manufacturer Part Number: P89LPC924
• Description: (P89LPC924 / P89LPC925) 8-bit microcontrollers
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 10:
V
T
[1]
[2]
9397 750 14471
Product data
Symbol
f
f
f
t
f
Glitch filter
External clock
t
t
t
t
Shift register (UART mode 0)
t
t
t
t
t
RCOSC
WDOSC
osc
CLCL
CLKP
CHCX
CLCX
CLCH
CHCL
XLXL
QVXH
XHQX
XHDX
DVXH
amb
DD
= 3.0 V to 3.6 V, unless otherwise specified.
Parameters are valid over operating temperature range unless otherwise specified. Parts are tested to 2 MHz, but are guaranteed to
operate down to 0 Hz.
When using an oscillator frequency above 12 MHz, the reset input function of P1.5 must be enabled. An external circuit is required to
hold the device in reset at power-up until V
minimum specified operating voltage. When using an oscillator frequency above 12 MHz, in some applications, an external brownout
detect circuit may be required to hold the device in reset when V
= 40 C to +85 C for industrial, unless otherwise specified.
AC characteristics
Parameter
internal RC oscillator frequency
(nominal f = 7.3728 MHz)
internal Watchdog oscillator
frequency (nominal f = 400 kHz)
oscillator frequency
clock cycle
CLKLP active frequency
glitch rejection, P1.5/RST pin
signal acceptance, P1.5/RST pin
glitch rejection, any pin except
P1.5/RST
signal acceptance, any pin except
P1.5/RST
HIGH time
LOW time
rise time
fall time
serial port clock cycle time
output data set-up to clock rising
edge
output data hold after clock rising
edge
input data hold after clock rising
edge
input data valid to clock rising edge
DD
has reached its specified level. When system power is removed V
Rev. 03 — 15 December 2004
Conditions
trimmed to 1%
at T
see
see
see
see
see
8-bit microcontrollers with accelerated two-clock 80C51 core
amb
Figure 13
Figure 13
Figure 13
Figure 13
Figure 13
= 25 C
DD
falls below the minimum specified operating voltage.
[1]
[2]
Variable clock
Min
7.189
320
0
55
0
-
125
-
50
22
22
-
-
16 t
13 t
-
-
150
CLCL
CLCL
Max
7.557
520
18
-
8
50
-
15
-
t
t
5
5
-
-
t
0
-
CLCL
CLCL
CLCL
P89LPC924/925
+ 20
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
t
t
CLCX
CHCX
f
Min
7.189
320
-
-
-
-
125
-
50
22
22
-
-
888
722
-
-
150
osc
DD
= 18 MHz
will fall below the
Max
7.557
520
-
-
-
50
-
15
-
-
-
5
5
-
-
75
0
-
43 of 49
Unit
MHz
kHz
MHz
ns
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns