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P89LPC925 Schematic ( PDF Datasheet ) - NXP Semiconductors

Teilenummer P89LPC925
Beschreibung (P89LPC924 / P89LPC925) 8-bit microcontrollers
Hersteller NXP Semiconductors
Logo NXP Semiconductors Logo 




Gesamt 30 Seiten
P89LPC925 Datasheet, Funktion
P89LPC924/925
8-bit microcontrollers with accelerated two-clock 80C51 core
4 kB/8 kB 3 V low-power Flash with 8-bit A/D converter
Rev. 03 — 15 December 2004
Product data
1. General description
The P89LPC924/925 are single-chip microcontrollers designed for applications
demanding high-integration, low cost solutions over a wide range of performance
requirements. The P89LPC924/925 is based on a high performance processor
architecture that executes instructions in two to four clocks, six times the rate of
standard 80C51 devices. Many system-level functions have been incorporated into
the P89LPC924/925 in order to reduce component count, board space, and system
cost.
2. Features
2.1 Principal features
s 4 kB/8 kB Flash code memory with 1 kB erasable sectors, 64-byte erasable page
size, and single byte erase.
s 256-byte RAM data memory.
s Two 16-bit counter/timers. Each timer may be configured to toggle a port output
upon timer overflow or to become a PWM output.
s Real-Time clock that can also be used as a system timer.
s 4-input 8-bit multiplexed A/D converter/single DAC output. Two analog
comparators with selectable inputs and reference source.
s Enhanced UART with fractional baud rate generator, break detect, framing error
detection, automatic address detection and versatile interrupt capabilities.
s 400 kHz byte-wide I2C-bus communication port.
s Configurable on-chip oscillator with frequency range and RC oscillator options
(selected by user programmed Flash configuration bits). The RC oscillator (factory
calibrated to ±1 %) option allows operation without external oscillator
components. Oscillator options support frequencies from 20 kHz to the maximum
operating frequency of 18 MHz. The RC oscillator option is selectable and fine
tunable.
s 2.4 V to 3.6 V VDD operating range. I/O pins are 5 V tolerant (may be pulled up or
driven to 5.5 V).
s 15 I/O pins minimum. Up to 18 I/O pins while using on-chip oscillator and reset
options.






P89LPC925 Datasheet, Funktion
Philips Semiconductors
P89LPC924/925
8-bit microcontrollers with accelerated two-clock 80C51 core
5.2 Pin description
Table 3: Pin description
Symbol
Pin
Type
P0.0 - P0.7
1, 20, 19, I/O
18, 17, 16,
14, 13
1 I/O
O
I
20 I/O
I
I
I
19 I/O
I
I
I
18 I/O
I
I
I
17 I/O
I
I
I
I
16 I/O
I
I
14 I/O
O
I
13 I/O
I/O
I
Description
Port 0: Port 0 is an 8-bit I/O port with a user-configurable output type. During reset
Port 0 latches are configured in the input only mode with the internal pull-up disabled.
The operation of Port 0 pins as inputs and outputs depends upon the port configuration
selected. Each port pin is configured independently. Refer to Section 8.13.1 “Port
configurations” and Table 8 “DC electrical characteristics” for details.
The Keypad Interrupt feature operates with Port 0 pins.
All pins have Schmitt triggered inputs.
Port 0 also provides various special functions as described below:
P0.0 — Port 0 bit 0.
CMP2 — Comparator 2 output.
KBI0 — Keyboard input 0.
P0.1 — Port 0 bit 1.
CIN2B — Comparator 2 positive input B.
KBI1 — Keyboard input 1.
AD10 — ADC1 channel 0 analog input.
P0.2 — Port 0 bit 2.
CIN2A — Comparator 2 positive input A.
KBI2 — Keyboard input 2.
AD11 — ADC1 channel 1analog input.
P0.3 — Port 0 bit 3.
CIN1B — Comparator 1 positive input B.
KBI3 — Keyboard input 3.
AD12 — ADC1 channel 2 analog input.
P0.4 — Port 0 bit 4.
CIN1A — Comparator 1 positive input A.
KBI4 — Keyboard input 4.
AD13 — ADC1 channel 3 analog input.
DAC1 — Digital-to-analog converter output 1.
P0.5 — Port 0 bit 5.
CMPREF — Comparator reference (negative) input.
KBI5 — Keyboard input 5.
P0.6 — Port 0 bit 6.
CMP1 — Comparator 1 output.
KBI6 — Keyboard input 6.
P0.7 — Port 0 bit 7.
T1 — Timer/counter 1 external count input or overflow output.
KBI7 — Keyboard input 7.
9397 750 14471
Product data
Rev. 03 — 15 December 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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Table 4: Special function registers…continued
* indicates SFRs that are bit addressable.
Name
Description
SFR Bit functions and addresses
addr. MSB
LSB
Reset value
Hex Binary
P0* Port 0
80H T1/KB7 CMP1 CMPREF CIN1A
/KB6
/KB5
/KB4
CIN1B
/KB3
CIN2A
/KB2
CIN2B
/KB1
CMP2
/KB0
[1]
Bit address 97 96 95 94 93 92 91 90
P1* Port 1
90H -
-
RST
INT1
INT0/ T0/SCL RXD
TXD
SDA
[1]
Bit address B7 B6 B5 B4 B3 B2 B1 B0
P3* Port 3
B0H - - - - - - XTAL1 XTAL2
[1]
P0M1
Port 0 output mode 1
84H (P0M1.7) (P0M1.6) (P0M1.5) (P0M1.4) (P0M1.3) (P0M1.2) (P0M1.1) (P0M1.0) FF
11111111
P0M2
Port 0 output mode 2
85H (P0M2.7) (P0M2.6) (P0M2.5) (P0M2.4) (P0M2.3) (P0M2.2) (P0M2.1) (P0M2.0) 00
00000000
P1M1
Port 1 output mode 1
91H (P1M1.7) (P1M1.6) - (P1M1.4) (P1M1.3) (P1M1.2) (P1M1.1) (P1M1.0) D3[1] 11x1xx11
P1M2
Port 1 output mode 2
92H (P1M2.7) (P1M2.6) - (P1M2.4) (P1M2.3) (P1M2.2) (P1M2.1) (P1M2.0) 00[1] 00x0xx00
P3M1
Port 3 output mode 1
B1H -
-
-
-
-
- (P3M1.1) (P3M1.0) 03[1] xxxxxx11
P3M2
Port 3 output mode 2
B2H -
-
-
-
-
- (P3M2.1) (P3M2.0) 00[1] xxxxxx00
PCON
Power control register
87H SMOD1 SMOD0 BOPD
BOI
GF1
GF0 PMOD1 PMOD0 00
00000000
PCONA Power control register A
B5H RTCPD
-
VCPD ADPD I2PD
-
SPD
- 00[1] 00000000
Bit address D7 D6 D5 D4 D3 D2 D1 D0
PSW*
Program status word
D0H CY AC F0 RS1 RS0 OV F1
P 00H 00000000
PT0AD Port 0 digital input disable
F6H
-
- PT0AD.5 PT0AD.4 PT0AD.3 PT0AD.2 PT0AD.1 - 00H xx00000x
RSTSRC Reset source register
DFH
-
-
BOF
POF
R_BK R_WD R_SF R_EX
[3]
RTCCON Real-time clock control
D1H RTCF RTCS1 RTCS0
-
-
- ERTC RTCEN 60[1][6]
RTCH
Real-time clock register
HIGH
D2H
00[6] 00000000
RTCL
Real-time clock register LOW D3H
00[6] 00000000
SADDR Serial port address register A9H
00 00000000
SADEN Serial port address enable B9H
00 00000000
SBUF
Serial Port data buffer
register
99H
xx xxxxxxxx
Bit address 9F 9E 9D 9C 9B 9A 99 98
SCON* Serial port control
98H SM0/FE SM1
SM2
REN
TB8
RB8
TI
RI 00
00000000

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