Os motores de busca de Datasheet de Componentes eletrônicos |
|
UPD78F9026A Folha de dados(PDF) 77 Page - NEC |
|
UPD78F9026A Folha de dados(HTML) 77 Page - NEC |
77 / 213 page CHAPTER 4 PORT FUNCTIONS User's Manual U11919EJ3V0UM00 77 4.2.5 Port 4 This is an 8-bit I/O port with output latch. Port 4 can be specified in the input or output mode in 1-bit units by using port mode register 4 (PM4). When using P40 to P47 pins as input port pins, on-chip pull-up resistors can be connected in 8-bit units by using the pull-up resistor option register (PUO). The pins of this port are also used as the key return input. RESET input sets port 4 to input mode. Figure 4-8 shows the block diagram of port 4. Caution When using port 4 for the key return function, it is necessary to set key return mode register 00. For details of the settings, see Section 10.3 (5). Figure 4-8. Block Diagram of P40 to P47 WRKRM00 VDD0 P40/KR0 to P47/KR7 WRPUO RD WRPORT WRPM PUO4 Alternate Function Output Latch (P40 to P47) PM40 to PM47 KRM000 to KRM007 P-ch KRM00 : Key return mode register 00 PUO : Pull-up resistor option register PM : Port mode register RD : Port 4 read signal WR : Port 4 write signal |
Nº de peça semelhante - UPD78F9026A |
|
Descrição semelhante - UPD78F9026A |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes 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 |