|
|
PDF X5169 Data sheet ( Hoja de datos )
| Número de pieza | X5169 | |
| Descripción | (X5168 / X5169) CPU Supervisor | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de X5169 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
®
Data Sheet
X5168, X5169
(Replaces X25268, X25169)
June 15, 2006
FN8130.2
CPU Supervisor with 16Kbit SPI EEPROM
These devices combine three popular functions, Power-on
Reset Control, Supply Voltage Supervision, and Block Lock
Protect Serial EEPROM Memory in one package. This
combination lowers system cost, reduces board space
requirements, and increases reliability.
Applying power to the device activates the power-on reset
circuit which holds RESET/RESET active for a period of
time. This allows the power supply and oscillator to stabilize
before the processor can execute code.
The device’s low VCC detection circuitry protects the user’s
system from low voltage conditions by holding
RESET/RESET active when VCC falls below a minimum VCC
trip point. RESET/RESET remains asserted until VCC returns
to proper operating level and stabilizes. Five industry
standard VTRIP thresholds are available, however, Intersil’s
unique circuits allow the threshold to be reprogrammed to
meet custom requirements or to fine-tune the threshold in
applications requiring higher precision.
www.DataSheet4U.com
Block Diagram
WP
SI
SO
SCK
CS
Data
Register
Command
Decode &
Control
Logic
Features
• Low VCC Detection and Reset Assertion
- Five standard reset threshold voltages
- Re-program low VCC reset threshold voltage using
special programming sequence
- Reset signal valid to VCC = 1V
• Long Battery Life with Low Power Consumption
- <50µA max standby current, watchdog on
- <1µA max standby current, watchdog off
- <400µA max active current during read
• 16Kbits of EEPROM
• Built-in Inadvertent Write Protection
- Power-up/power-down protection circuitry
- Protect 0, 1/4, 1/2 or all of EEPROM array with Block
Lock™ protection
- In circuit programmable ROM mode
• 2MHz SPI Interface Modes (0,0 & 1,1)
• Minimize EEPROM Programming Time
- 32-byte page write mode
- Self-timed write cycle
- 5ms write cycle time (typical)
• 2.7V to 5.5V and 4.5V to 5.5V Power Supply
Operation
• Available Packages
- 14 Ld TSSOP, 8 Ld SOIC, 8 Ld PDIP
• Pb-Free Plus Anneal Available (RoHS Compliant)
Protect Logic
Status
Register
4Kbits
4Kbits
8Kbits
VCC
VTRIP
+
-
Reset
Timebase
Power-on and
Low Voltage
Reset
Generation
RESET/RESET
X5168 = RESET
X5169 = RESET
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
X5168, X5169
Principles of Operation
Power-on Reset
Application of power to the X5168, X5169 activates a power-
on reset circuit. This circuit goes active at about 1V and pulls
the RESET/RESET pin active. This signal prevents the
system microprocessor from starting to operate with
insufficient voltage or prior to stabilization of the oscillator.
When VCC exceeds the device VTRIP value for 200ms
(nominal) the circuit releases RESET/RESET, allowing the
processor to begin executing code.
Low Voltage Monitoring
During operation, the X5168, X5169 monitors the VCC level
and asserts RESET/RESET if supply voltage falls below a
preset minimum VTRIP. The RESET/RESET signal prevents
the microprocessor from operating in a power fail or
brownout condition. The RESET/RESET signal remains
active until the voltage drops below 1V. It also remains active
until VCC returns and exceeds VTRIP for 200ms.
VCC Threshold Reset Procedure
The X5168, X5169 has a standard VCC threshold (VTRIP)
voltage. This value will not change over normal operating
and storage conditions. However, in applications where the
standard VTRIP is not exactly right, or for higher precision in
the VTRIP value, the X5168, X5169 threshold may be
adjusted.
Setting the VTRIP Voltage
This procedure sets the VTRIP to a higher voltage value. For
example, if the current VTRIP is 4.4V and the new VTRIP is
4.6V, this procedure directly makes the change. If the new
setting is lower than the current setting, then it is necessary
to reset the trip point before setting the new value.
To set the new VTRIP voltage, apply the desired VTRIP
threshold to the VCC pin and tie the CS pin and the WP pin
HIGH. RESET/RESET and SO pins are left unconnected.
Then apply the programming voltage VP to both SCK and SI
and pulse CS LOW then HIGH. Remove VP and the
sequence is complete.
Resetting the VTRIP Voltage
This procedure sets the VTRIP to a “native” voltage level. For
example, if the current VTRIP is 4.4V and the VTRIP is reset,
the new VTRIP is something less than 1.7V. This procedure
must be used to set the voltage to a lower value.
To reset the VTRIP voltage, apply a voltage between 2.7 and
5.5V to the VCC pin. Tie the CS pin, the WP pin, and the SCK
pin HIGH. RESET/RESET and SO pins are left unconnected.
Then apply the programming voltage VP to the SI pin ONLY
and pulse CS LOW then HIGH. Remove VP and the
sequence is complete.
CS
SCK VCC
VP
SI
FIGURE 2. RESET VTRIP VOLTAGE
CS
VP
SCK
VP
SI
FIGURE 1. SET VTRIP VOLTAGE
5 FN8130.2
June 15, 2006
5 Page 
X5168, X5169
CS
SCK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Instruction
SI
Data Byte
7 6 5 43 2 1 0
SO
Symbol Table
High Impedance
FIGURE 9. STATUS REGISTER WRITE SEQUENCE
WAVEFORM
INPUTS
Must be
steady
May change
from LOW
to HIGH
May change
from HIGH
to LOW
Don’t Care:
Changes
Allowed
N/A
OUTPUTS
Will be
steady
Will change
from LOW
to HIGH
Will change
from HIGH
to LOW
Changing:
State Not
Known
Center Line
is High
Impedance
11 FN8130.2
June 15, 2006
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet X5169.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| X5163 | CPU Supervisor with 16Kbit SPI EEPROM |  Xicor |
| X5163 | (X5163 / X5165) CPU Supervisor | Intersil Corporation |
| X5163P | CPU Supervisor with 16Kbit SPI EEPROM | Xicor |
| X5163S8 | CPU Supervisor with 16Kbit SPI EEPROM | Xicor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |