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参数资料
| 型号： | FM3316-G |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO14 |
| 封装： | GREEN, MO-012AB, SOIC-14 |
| 文件页数： | 13/28页 |
| 文件大小： | 320K |
| 代理商： | FM3316-G |
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FM33256/FM3316 SPI Companion w/ FRAM
Rev. 2.0
Feb. 2009
Page 20 of 28
RDSR – Read Status Register
The RDSR command allows the bus master to verify
the contents of the Status Register. Reading this
register provides information about the current state
of the write protection bits. Following the RDSR op-
code, the FM33xx will return one byte with the
contents of the Status Register. The Status Register is
described in detail in a later section.
WRSR – Write Status Register
The WRSR command allows the user to select
certain write protection features by writing a byte to
the Status Register. Prior to sending the WRSR
command, the user must send a WREN command to
enable writes. Note that executing a WRSR
command is a write operation and therefore clears
the Write Enable Latch. The bus timings of RDSR
and WRSR are shown below.
Figure 15. RDSR Bus Configuration
Figure 16. WRSR Bus Configuration
RDPC – Read Processor Companion
The RDPC command allows the bus master to verify
the contents of the Processor Companion registers.
Following the RDPC op-code, a single-byte register
address is sent. The FM33xx will then return one or
more bytes with the contents of the companion
registers. When reading multiple data bytes, the
internal register address will wrap around to 00h
after 1Dh is reached.
WRPC – Write Processor Companion
The WRPC command is used to set companion
control settings. A WREN command is required
prior to sending the WRPC command. Following the
WRPC op-code, a single-byte register address is
sent. The controller then drives one or more bytes to
program the companion registers. When writing
multiple data bytes, the internal register address will
wrap around to 00h after 1Dh is reached. The rising
edge of /CS terminates a WRPC operation. See
Figure 18.
Figure 17. Processor Companion Read
01
2
34567
0
1
2
3
4
5
01
2
34567
op-code
0
1
0
1
MSB
Register Address
7
6
5
4
3
2
CS
SCK
SI
SO
1
6
0
7
LSB
MSB
LSB
Data Out
0
7
Hi-Z
7
6
5
4
3
21
0
LSB
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| FM33256-GTR | SPECIALTY CONSUMER CIRCUIT, PDSO14 |
| FM33256-G | SPECIALTY CONSUMER CIRCUIT, PDSO14 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FM3316-GTR | 功能描述:F-RAM 16K w/Pwr Mon WDT Bat Sw Pwr Fail RoHS:否 存储容量:512 Kbit 组织:64 K x 8 接口:SPI 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube 制造商:Cypress Semiconductor |
| FM33256 | 制造商:RAMTRON 制造商全称:RAMTRON 功能描述:3V Integrated Processor Companion with Memory |
| FM33256_09 | 制造商:RAMTRON 制造商全称:RAMTRON 功能描述:3V Integrated Processor Companion with Memory |
| FM33256B | 制造商:CYPRESS 制造商全称:Cypress Semiconductor 功能描述:3V Integrated Processor Companion with F-RAM |
| FM33256B-G | 功能描述:实时时钟 256Kb F-RAM Processor Companion RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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