pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 167
![no-image](/images/no-image-200.jpg)
pc87591l
Manufacturer Part Number
pc87591l
Description
Lpc Mobile Embedded Controllers
Manufacturer
National Semiconductor Corporation
Datasheet
1.PC87591L.pdf
(437 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PC87591L
Manufacturer:
NS
Quantity:
5 510
Company:
Part Number:
PC87591L
Manufacturer:
MOT
Quantity:
5 510
Company:
Part Number:
pc87591l-VPCN01
Manufacturer:
NSC
Quantity:
5 510
Part Number:
pc87591l-VPCN01
Manufacturer:
NS/国半
Quantity:
20 000
- Current page: 167 of 437
- Download datasheet (3Mb)
Revision 1.07
Embedded Controller Modules
Timer and WATCHDOG Clock Pre-Scaler Register (TWCP)
The TWCP register is a byte-wide, read/write register. It defines the pre-scale ratio of the input clock and generates the T0IN
clock. On reset, the non-reserved bits of TWCP are initialized to 0.
Location: 00 FEE2
Type: R/W
TWD Timer 0 Register (TWDT0)
The TWDT0 register is a read/write register. It defines the T0OUT interrupt rate. On reset, this register is initialized to
FFFF
Location: 00 FEE4
Type: R/W
Bit
Name
Reset
Bit
Name
Reset
15-0 PRESET. Defines the counter preset value. Whenever the counter reaches zero, it starts counting down from
7-6
Bit
2-0
7-3
Bit
Bit
5
16
.
WDSDME. Selects the WATCHDOG touch mechanism
0: Disables the WATCHDOG service using WDSDM register. In this case, the WATCHDOG should be serviced
1: Selects the use of data match using the WDSDM mechanism.
Reserved.
MDIV. Defines the pre-scale ratio of the input clock. The pre-scale ratio is 2
the range of 0-5, providing a pre-scale ratio of 1 to 32.
MDIV allowed values:
Bits
2 1 0
0 0 0:
0 0 1:
0 1 0:
0 1 1:
1 0 0:
1 0 1:
Other
Reserved.
this value. The T0OUT frequency is the T0IN frequency divided by (PRESET+1). The allowed values of the
PRESET field are 0001
by writing a value to WDCNT register. When this bit is cleared, write operations to WDSDM are ignored.
15
1
16
16
Clock Ratio
1:1
1:2
1:4
1:8
1:16
1:32
Reserved
7
0
14
1
13
1
16
6
0
through FFFF
12
1
Reserved
11
1
(Continued)
5
0
16
10
1
.
9
1
Description
Description
Description
167
4
0
PRESET
8
1
7
1
3
0
6
1
5
1
MDIV
2
0
. The value of MDIV must be in
4
1
3
1
MDIV
1
0
2
1
www.national.com
1
1
0
0
0
1
Related parts for pc87591l
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![mma1270keg](/images/no-image3.png)
Part Number:
Description:
Freescale Semiconductor Technical Data
Manufacturer:
National Semiconductor Corporation
Datasheet:
![ADC12034](/images/no-image3.png)
Part Number:
Description:
Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
Manufacturer:
National Semiconductor Corporation
Datasheet:
![LMX2350](/images/no-image3.png)
Part Number:
Description:
Pllatinum Tm Fractional N Rf / Integer N If Dual Low Power Frequency Synthesizer
Manufacturer:
National Semiconductor Corporation
Datasheet:
![LMX2324](/images/no-image3.png)
Part Number:
Description:
Pllatinum? 2.0 Ghz Frequency Synthesizer For Rf Personal Communications
Manufacturer:
National Semiconductor Corporation
Datasheet:
![LMX2301](/images/no-image3.png)
Part Number:
Description:
Pllatinumtm 160 Mhz Frequency Synthesizer For Rf Personal Communications
Manufacturer:
National Semiconductor Corporation
Datasheet:
![NDS8963](/images/no-image3.png)
Part Number:
Description:
Dual N-channel Enhancement Mode Field Effect Transistor
Manufacturer:
National Semiconductor Corporation
Datasheet:
![LM1201](/images/no-image3.png)
Part Number:
Description:
Video Amplifier System (obsolete)
Manufacturer:
National Semiconductor Corporation
Datasheet:
![LM3501TL-16](/images/no-image3.png)
Part Number:
Description:
Synchronous Step-up DC/DC Converter For White Led Applications
Manufacturer:
National Semiconductor Corporation
Datasheet:
![AD9621](/images/no-image3.png)
Part Number:
Description:
CLC420 - High Speed, Voltage Feedback op Amp, Package: Lcc, Pin Nb=20
Manufacturer:
National Semiconductor Corporation
Datasheet:
![LM2403](/images/no-image3.png)
Part Number:
Description:
Monolithic Triple 4.5 CRT Driver
Manufacturer:
National Semiconductor Corporation
Datasheet:
![LM592M](/images/no-image3.png)
Part Number:
Description:
Differential Video Amplifier
Manufacturer:
National Semiconductor Corporation
Datasheet:
![ADC10061](/images/no-image3.png)
Part Number:
Description:
ADC10061 - 10-Bit 600 NS A/D Converter With Input Multiplexer And Sample/Hold, Package: Soic Wide, Pin Nb=20
Manufacturer:
National Semiconductor Corporation
Datasheet:
![DS36277TMX](/images/no-image3.png)
Part Number:
Description:
DS36277 - Dominant Mode Multipoint Transceiver, Package: Soic Narrow, Pin Nb=8
Manufacturer:
National Semiconductor Corporation
Datasheet:
![DS3654](/images/no-image3.png)
Part Number:
Description:
Printer Solenoid Driver
Manufacturer:
National Semiconductor Corporation
Datasheet:
![DS3662](/images/no-image3.png)
Part Number:
Description:
Quad High Speed Trapezoidal Bus Transceiver
Manufacturer:
National Semiconductor Corporation
Datasheet: