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L9805 데이터시트(PDF) 82 Page - STMicroelectronics

부품명 L9805
상세설명  Super Smart Power Motor Driver with 8-BIT MCU, CAN Interface, 16K EPROM, 256Bytes RAM, 128 Bytes EEPROM, 10 Bit ADC, WDG, 2 Timers, 2 PWM Modules, Ful
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9805 데이터시트(HTML) 82 Page - STMicroelectronics

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L9805
5.9 EEPROM (EEP)
5.9.1 Introduction
The Electrically Erasable Programmable Read
Only Memory is used to store data that need a non
volatile back-up. The use of the EEPROM requires
a basic protocol described in this chapter.
Software or hardware reset and halt modes are
managed immediately, stopping the action in
progress. Wait mode does not affect the program-
ming of the EEPROM.
The Read operation of this memory is the same of
a Read-Only-Memory or RAM. The erase and pro-
gramming cycles are controlled by an EEPROM
control register.
The user can program 1 to 4 bytes at the same
programming cycle providing that the high part of
the address is the same for the bytes to be written
(only address bits A1 and A0 can change).
The EEPROM is mono-voltage. A charge pump
generates the high voltage internally to enable the
erase and programming cycles. The erase and
programming cycles are chained automatically.
The global programming cycle duration is control-
led by an internal circuit.
Figure 43. EEPROM Block Diagram
BUFFER
ROW
DECODER
4*8 BITS
DATA LATCHES
DATA
MULTIPLEXER
HIGH VOLTAGE PUMP
EEPROM
MEMORY
MATRIX
1 ROW = 4 * 8 BITS
ADDRESS
DECODER
ADDRESS
BUS
DATA
BUS
E2ITE E2LAT E2PGM
EEPCR
.
.
.
.
.
.
32
32
8
8
4
4
12
INTERRUPT
REQUEST
FALLING
EDGE
DETECTOR
8 bit
Read amplifiers



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