Os motores de busca de Datasheet de Componentes eletrônicos |
|
ST16C654CQ64 Folha de dados(PDF) 7 Page - Exar Corporation |
|
ST16C654CQ64 Folha de dados(HTML) 7 Page - Exar Corporation |
7 / 49 page ST16C654/654D 5-71 Rev. 4.10 SYMBOL DESCRIPTION dition exists. Interrupt conditions include: receiver errors, available receiver buffer data, transmit buffer empty, or when a modem status flag is detected. When the 68 mode is selected, the functions of these pins are reassigned. 68 mode functions are described under the their respective name/pin headings. INTSEL 65 87 - I Interrupt Select. (active high, with internal pull-down) - This function is associated with the 16 mode only. When the 16 mode is selected, this pin can be used in conjunction with MCR bit-3 to enable or disable the three state interrupts, INT A-D or override MCR bit-3 and force continuous interrupts. Interrupt outputs are enabled continuously by making this pin a logic 1. Making this pin a logic 0 allows MCR bit-3 to control the three state interrupt output. In this mode, MCR bit-3 is set to a logic “1” to enable the three state outputs. This pin is disabled in the 68 mode. Due to pin limitations on 64 pin packages, this pin is not available. To cover this limitation, two 64 pin QFP package versions are offered. The ST16C654DCQ64 operates in the continuos interrupt enable mode by bonded this pin to VCC internally. The ST16C654CQ64 operates with MCR bit-3 control by bond- ing this pin to GND. -IOR 52 66 40 I Input/Output Read. (active low Strobe) - This function is associated with the 16 mode only. A logic 0 transition on this pin will load the contents of an Internal register defined by address bits A0-A2 onto the ST16C654 data bus (D0-D7) for access by an external CPU. This pin is disabled in the 68 mode. -IOW 18 15 9 I Input/Output Write. (active low strobe) - This function is associated with the 16 mode only. A logic 0 transition on this pin will transfer the contents of the data bus (D0-D7) from the external CPU to an internal register that is defined by address bits A0/A2. When the 16 mode is selected (68/100 pin devices), this pin functions as R/-W, see definition under R/W. -IRQ 15 12 - O Interrupt Request or Interrupt “A” - This function is associ- Symbol Pin Signal Pin Description 68 100 64 type |
Nº de peça semelhante - ST16C654CQ64 |
|
Descrição semelhante - ST16C654CQ64 |
|
|
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 |