Electronic Components Datasheet Search |
|
ADUC844BCP62-5 Datasheet(PDF) 11 Page - Analog Devices |
|
ADUC844BCP62-5 Datasheet(HTML) 11 Page - Analog Devices |
11 / 20 page ADuC844 REV. PrB -11- PRELIMINARY TECHNICAL DATA Pin No: 52-MQFP Pin No: 56-CSP Pin Mnemonic Type* Description 41 44 PSEN Program Store Enable, Logic Output. This output is a control signal that enables the external program memory to the bus during external fetch operations. It is active every six oscillator periods except during external data memory accesses. This pin remains high during internal program execution. PSEN can also be used to enable serial download mode when pulled low through a resistor at the end of an external RESET assertion or as part of a device power cycle. 42 45 ALE Address Latch Enable, Logic Output. This output is used to latch the low byte (and page byte for 24-bit data address space accesses) of the address to external memory during external code or data memory access cycles. It is activated every six oscillator periods except during an external data memory access. It can be disabled by setting the PCON.4 bit in the PCON SFR. 43 à 46 49 à 52 46 à 49 52 à 55 P0.0 à P0.7 I/O P0.0–P0.7, these pins are part of Port0 which is an 8-bit open-drain bidirectional I/O port. Port 0 pins that have 1s written to them float and in that state can be used as high impedance inputs. An external pull-up resistor will be required on P0 outputs to force a valid logic high level externally. Port 0 is also the multiplexed low-order address and data bus during accesses to external program or data memory. In this application it uses strong internal pull-ups when emitting 1s. *I = Input, O = Output, S = Supply. |
Similar Part No. - ADUC844BCP62-5 |
|
Similar Description - ADUC844BCP62-5 |
|
|
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 |