전자부품 데이터시트 검색엔진 |
|
FM3808 데이터시트(PDF) 2 Page - Ramtron International Corporation |
|
FM3808 데이터시트(HTML) 2 Page - Ramtron International Corporation |
2 / 28 page FM3808 Rev 1.1 May 2003 Page 2 of 28 FRAM Array 32,752x8 Address Decoder/ Bus Interface 16 Clock/Calendar Registers Clock/Calendar Alarm Interrupt Control Logic System Supervisor Low VDD monitor/ Watchdog timer Data Address CE OE WE INT 32.768 kHz VDD VBAK Switched power Watchdog timebase X1 X2 Figure 1. Block Diagram Pin Description Pin Name I/O Pin Description A0-A14 Input Address: The 15 address inputs select one of 32,752 bytes in the FRAM array or one of 16 bytes in the clock/calendar. The address is latched on the falling edge of /CE. DQ(7:0) I/O Data: Bi-directional 8-bit data bus for accessing the FRAM array and clock. /CE Input Chip Enable: The active low /CE input selects the device. The falling edge of /CE internally latches the address. Address changes that occur after /CE has transitioned low are ignored until the next falling edge occurs. /OE Input Output Enable: The active low /OE input enables the data output buffers during read cycles. Deasserting /OE high causes the DQ pins to tri-state. /WE Input Write Enable: The active low /WE low enables data on the DQ pins to be written to the address location latched by the falling edge of /CE. X1, X2 Input Connect 32.768 kHz crystal. INT Output Interrupt output: This output can be programmed to respond to the clock/calendar alarm, the watchdog timer, and the power monitor. It is programmable to either active high (push/pull) or active low (open-drain). VBAK Supply Backup Supply Voltage: This supply is used to maintain power for the clock. It must remain between 2.5V and VDD-0.3V. VBAK is typically supplied by either a capacitor or a battery. Current is drawn from VBAK when VDD is below the VBAK voltage. VDD Supply Supply Voltage: 5V VSS Supply Ground. |
유사한 부품 번호 - FM3808 |
|
유사한 설명 - FM3808 |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |