P89LPC9401FBD NXP Semiconductors, P89LPC9401FBD Datasheet - Page 28
![IC, MCU 8BIT 80C51, LCD DRIVER, SMD](/photos/19/1/190186/ge64lqfp05-40_sml.jpg)
P89LPC9401FBD
Manufacturer Part Number
P89LPC9401FBD
Description
IC, MCU 8BIT 80C51, LCD DRIVER, SMD
Manufacturer
NXP Semiconductors
Datasheet
1.P89LPC9401FBD551.pdf
(59 pages)
Specifications of P89LPC9401FBD
Controller Family/series
(8051) 8052
Core Size
8bit
No. Of I/o's
23
Program Memory Size
8KB
Ram Memory Size
256Byte
Cpu Speed
18MHz
Oscillator Type
External, Internal
No. Of Timers
4
No.
RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
P89LPC9401FBD
Manufacturer:
NXP/恩智浦
Quantity:
20 000
Company:
Part Number:
P89LPC9401FBD,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Company:
Part Number:
P89LPC9401FBD,557
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Company:
Part Number:
P89LPC9401FBDЈ¬551
Manufacturer:
NXP
Quantity:
3 048
Philips Semiconductors
P89LPC9401_1
Preliminary data sheet
7.19.10 The 9
7.19.9 Transmit interrupts with double buffering enabled (modes 1, 2 and 3)
Double buffering can be disabled. If disabled (DBMOD, i.e., SSTAT.7 = 0), the UART is
compatible with the conventional 80C51 UART. If enabled, the UART allows writing to
SnBUF while the previous data is being shifted out. Double buffering is only allowed in
Modes 1, 2 and 3. When operated in Mode 0, double buffering must be disabled
(DBMOD = 0).
Unlike the conventional UART, in double buffering mode, the TX interrupt is generated
when the double buffer is ready to receive new data.
If double buffering is disabled TB8 can be written before or after SBUF is written, as long
as TB8 is updated some time before that bit is shifted out. TB8 must not be changed until
the bit is shifted out, as indicated by the TX interrupt.
If double buffering is enabled, TB8 must be updated before SBUF is written, as TB8 will
be double-buffered together with SBUF data.
th
bit (bit 8) in double buffering (modes 1, 2 and 3)
8-bit two-clock 80C51 microcontroller with 32 segment
Rev. 01 — 5 September 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
P89LPC9401
4 LCD driver
28 of 59