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参数资料
| 型号： | MAX6890ETI |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors |
| 中文描述： | 6-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC28 |
| 封装： | 5 X 5 MM, TQFN-28 |
| 文件页数： | 27/40页 |
| 文件大小： | 255K |
| 代理商： | MAX6890ETI |
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MAX6889/MAX6890/MAX6891
EEPROM-Programmable, Octal/Hex/Quad,
Power-Supply Sequencers/Supervisors
______________________________________________________________________________________
33
Send Byte
The send byte protocol allows the master device to
send one byte of data to the slave device (see Figure
8). The send byte presets a register pointer address for
a subsequent read or write. The slave sends a NACK
instead of an ACK if the master tries to send an
address that is not allowed or if the device is writing
data to EEPROM or is booting. If the master sends C0h,
the data is ACK. This could be the start of the block
write protocol, and the slave expects the following data
bytes. If the master sends a Stop condition, the internal
address pointer does not change. If the master sends
C1h, this signifies that the block read protocol is
expected, and a repeated Start condition should follow.
The device reboots if the master sends C4h. The send
byte procedure follows:
1) The master sends a Start condition.
2) The master sends the 7-bit slave address and a
write bit (low).
3) The addressed slave asserts an ACK on SDA.
4) The master sends an 8-bit data byte.
5) The addressed slave asserts an ACK on SDA.
6) The master sends a Stop condition.
Write Byte
The write byte protocol allows the master device to write
a single byte in the register bank or in the EEPROM
(configuration or user) (see Figure 8). The Write Byte
procedure follows:
1) The master sends a Start condition.
2) The master sends the 7-bit slave address and a
write bit (low).
3) The addressed slave asserts an ACK on SDA.
4) The master sends an 8-bit command code.
5) The addressed slave asserts an ACK on SDA.
6) The master sends an 8-bit data byte.
7) The addressed slave asserts an ACK on SDA.
8) The master sends a Stop condition.
In order to write a single byte to the register bank, only
the 8-bit command code and a single 8-bit data byte
are sent. The command code must be in the range of
00h to 2Eh. The data byte is written to the register bank
if the command code is valid. The slave generates a
NACK at step 5 if the command code is invalid or any
internal operations are ongoing.
In order to write a single byte of data to the user or con-
figuration EEPROM, the 8-bit command code and a sin-
gle 8-bit data byte are sent. The following 8-bit data
byte is written to the addressed EEPROM location.
Block Write
The block write protocol allows the master device to
write a block of data (1 to 16 bytes) to the EEPROM or
to the register bank (see Figure 8). The destination
address must already be set by the send byte protocol
and the command code must be C0h. If the number of
bytes to be written causes the address pointer to
exceed 2Fh for the configuration register or B7h for the
configuration EEPROM, the address pointer stops
incrementing, overwriting the last memory address with
the remaining bytes of data. Only the last data byte
sent is stored in B7h (as 2Fh is read only and a write
causes no change in the content). If the number of
bytes to be written exceeds the address pointer 7Fh for
the user EEPROM, the address pointer stops incre-
menting and continues writing exceeding data to the
last address. Only the last data is actually written to
7Fh. The block write procedure follows:
1) The master sends a Start condition.
2) The master sends the 7-bit slave address and a
write bit (low).
3) The addressed slave asserts an ACK on SDA.
4) The master sends the 8-bit command code for
block write (C0h).
5) The addressed slave asserts an ACK on SDA.
6) The master sends the 8-bit byte count (1 to 16
bytes) N.
7) The addressed slave asserts an ACK on SDA.
8) The master sends 8 bits of data.
9) The addressed slave asserts an ACK on SDA.
10) Repeat steps 8 and 9 N – 1 times.
11) The master generates a Stop condition.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6891ETP | EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors |
| MG200-BCG24HD | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG24H | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG28HD | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG5H | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6890ETI+ | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6890ETI-T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6891ETP | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6891ETP+ | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6891ETP+T | 功能描述:监控电路 EEPROM-Programmable Octal/Hex/Quad Power-Supply Sequencers/Supervisors RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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