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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： | 9/28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 17 of 28
02h
Timekeeping – Seconds
D7
D6
D5
D4
D3
D2
D1
D0
0
10 sec.2
10 sec.1
10 sec.0
Seconds.3
Seconds.2
Seconds.1
Seconds.0
Contains the BCD value of seconds. Lower nibble contains the lower digit and operates from 0 to 9; upper nibble
contains the upper digit and operates from 0 to 5. The range for the register is 0-59. Battery-backed, read/write.
01h
CAL/Control
D7
D6
D5
D4
D3
D2
D1
D0
-
CALS
CAL.4
CAL.3
CAL.2
CAL.1
CAL.0
CALS
Calibration Sign: Determines if the calibration adjustment is applied as an addition to or as a subtraction from the
time-base. This bit can be written only when CAL=1. Nonvolatile, read/write.
CAL.4-0
Calibration Code: These five bits control the calibration of the clock. These bits can be written only when
CAL=1. Nonvolatile, read/write.
00h
RTC/Alarm Control
D7
D6
D5
D4
D3
D2
D1
D0
OSCEN
AF
CF
AEN
Reserved
CAL
W
R
/OSCEN
Oscillator Enable. When set to ‘1’, the oscillator is halted. When set to ‘0’, the oscillator runs. Disabling the
oscillator can save battery power during storage. On a power-up without a VBAK source or on a power-up after a
VBAK source has been applied, this bit is internally set to ‘1’, which turns off the oscillator. Battery-backed,
read/write.
AF
Alarm Flag: This bit is set to 1 when the time and date match the values stored in the alarm registers with the
Match bit(s) = 0. The user must clear it to ‘0’. Battery-backed. (internally set, user must clear bit)
CF
Century Overflow Flag: This bit is set to a 1 when the values in the years register overflows from 99 to 00. This
indicates a new century, such as going from 1999 to 2000 or 2099 to 2100. The user should record the new
century information as needed. The user must clear the CF bit to ‘0’. Battery-backed. (internally set, user must
clear bit)
AEN
Alarm Enable: This bit enables the alarm function. When AEN is set (and CAL cleared), the ACS pin operates as
an active-low alarm. The state of the ACS pin is detailed in Table 2. When AEN is cleared, no new alarm events
that set the AF bit will be generated. Clearing the AEN bit does not automatically clear AF. Battery-backed.
CAL
Calibration Mode: When CAL is set to 1, the clock enters calibration mode. When CAL is set to 0, the clock
operates normally, and the ACS pin is controlled by the RTC alarm. Battery-backed, read/write.
W
Write Time. Setting the W bit to 1 freezes updates of the user timekeeping registers. The user can then write
them with updated values. Setting the W bit to 0 causes the contents of the time registers to be transferred to the
timekeeping counters. Battery-backed, read/write.
R
Read Time. Setting the R bit to ‘1’ copies a static image of the timekeeping core and places it into the user
registers. The user can then read them without concerns over changing values causing system errors. The R bit
going from 0 to 1 causes the timekeeping capture, so the bit must be returned to 0 prior to reading again. Battery-
backed, read/write.
Reserved
Reserved bits. Do not use. Should remain set to 0.
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相关代理商/技术参数 |
参数描述 |
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| 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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