Electronic Components Datasheet Search |
|
CY14C101I Datasheet(PDF) 8 Page - Cypress Semiconductor |
|
CY14C101I Datasheet(HTML) 8 Page - Cypress Semiconductor |
8 / 42 page PRELIMINARY CY14C101I CY14B101I, CY14E101I Document #: 001-54391 Rev. *C Page 8 of 42 Memory Slave Device The nvSRAM device is selected for read/write if the master issues the slave address as 1010b followed by two bits of device select. If slave address sent by the master matches with the Memory Slave device address then depending on the R/W bit of the slave address, data will be either read from (R/W = ‘1’) or written to (R/W = ‘0’) the nvSRAM. The address length for CY14X101I is 17 bits, and thus it requires three address bytes to map the entire memory address location. To save an extra byte for memory addressing, the 17th bit (A16) is mapped to the slave address select bit (A0). The dedicated two address bytes represent bit A0 to A15. RTC Registers Slave Device The RTC Registers is selected for read/write if the master issues the slave address as 1101b followed by two bits of device select. Then, depending on the R/W bit of the slave address, data is either read from (R/W = ‘1’) or written to (R/W = ‘0’) the RTC Registers. The RTC Registers slave address is followed by one byte address of RTC Register for read/write operation. The RTC Registers map is explained in the Table 11. Control Registers Slave Device The Control Registers Slave device includes the serial number, product ID, Memory Control, and Command Register. The nvSRAM Control Register Slave device is selected for read/write if the master issues the slave address as 0011b followed by two bits of device select. Then, depending on the R/W bit of the slave address, data is either read from (R/W = ‘1’) or written to (R/W = ‘0’) the device. Memory Control Register The Memory Control Register contains the following bits: ■ BP1:BP0: Block protect bits are used to protect 1/4, 1/2 or full memory array. These bits can be written through a write instruction to the 0x00 location of the Control Register Slave device. However, any STORE cycle transfers SRAM data into a nonvolatile cell regardless of whether or not the block is protected. The default value shipped from the factory for BP0 and BP1 is ‘0’. ■ SNL (S/N Lock) Bit: Serial Number Lock bit (SNL) is used to lock the serial number. Once the bit is set to ‘1’, the serial number registers are locked and no modification is allowed. This bit cannot be cleared to ‘0’. The serial number is secured on the next STORE operation (Software STORE or AutoStore). If AutoStore is not enabled, user must perform Software STORE operation to secure the lock bit status. If a STORE was not performed, the serial number lock bit will not survive power cycle. The default value shipped from the factory for SNL is ‘0’. Figure 7. Memory Slave Device Address Figure 8. RTC Registers Slave Device Address Figure 9. Control Registers Slave Device Address handbook, halfpage R/W LSB MSB Slave ID 10 1 0 A2 A16 A1 Device Select MSB of Address handbook, halfpage R/W LSB MSB Slave ID 11 0 1 A2 X A1 Device Select handbook, halfpage R/W LSB MSB Slave ID 00 1 1 A2 X A1 Device Select Table 3. Control Registers Map Address Description Read/Write Details 0x00 Memory Control Register Read/Write Contains Block Protect bits and Serial Number lock bit 0x01 Serial Number 8 bytes Read/Write (Read only when SNL is set) Programmable Serial Number. Locked by setting the Serial Number lock bit in the Memory Control Register to ‘1’. 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 Device ID Read only Device ID is factory programmed 0x0A 0x0B 0x0C 0x0D Reserved Reserved Reserved 0xAA Command Register Write only Allows commands for STORE, RECALL, AutoStore Enable/Disable, SLEEP Mode Table 4. Memory Control Register Bits Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 0SNL (0) 00 BP1 (0) BP0 (0) 00 Table 5. Block Protection Level BP1:BP0 Block Protection 0 00 None 1/4 01 0x18000-0x1FFFF 1/2 10 0x10000-0x1FFFF 1 11 0x00000-0x1FFFF [+] Feedback |
Similar Part No. - CY14C101I |
|
Similar Description - CY14C101I |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |