Electronic Components Datasheet Search |
|
PCA9554ATS Datasheet(PDF) 7 Page - NXP Semiconductors |
|
PCA9554ATS Datasheet(HTML) 7 Page - NXP Semiconductors |
7 / 35 page PCA9554_9554A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. Product data sheet Rev. 9 — 19 March 2013 7 of 35 NXP Semiconductors PCA9554; PCA9554A 8-bit I2C-bus and SMBus I/O port with interrupt 6.1.2 Register 0 - Input Port register This register is a read-only port. It reflects the incoming logic levels of the pins, regardless of whether the pin is defined as an input or an output by Register 3. Writes to this register have no effect. The default ‘X’ is determined by the externally applied logic level, normally ‘1’ when no external signal externally applied because of the internal pull-up resistors. 6.1.3 Register 1 - Output Port register This register reflects the outgoing logic levels of the pins defined as outputs by Register 3. Bit values in this register have no effect on pins defined as inputs. Reads from this register return the value that is in the flip-flop controlling the output selection, not the actual pin value. Table 5. Register 0 - Input Port register bit description Bit Symbol Access Value Description 7 I7 read only X determined by externally applied logic level 6 I6 read only X 5 I5 read only X 4 I4 read only X 3 I3 read only X 2 I2 read only X 1 I1 read only X 0 I0 read only X Table 6. Register 1 - Output Port register bit description Legend: * default value. Bit Symbol Access Value Description 7 O7 R 1* reflects outgoing logic levels of pins defined as outputs by Register 3 6O6 R 1* 5O5 R 1* 4O4 R 1* 3O3 R 1* 2O2 R 1* 1O1 R 1* 0O0 R 1* |
Similar Part No. - PCA9554ATS |
|
Similar Description - PCA9554ATS |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |