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Data Connect DSP19.2 Guia do Utilizador Página 25

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CY7C66013
C
CY7C66113
C
Document #: 38-08024 Rev. *B Page 25 of 61
Port 1 Interrupt Enable ADDRESS 0x05
Port 2 Interrupt Enable ADDRESS 0x06
Port 3 Interrupt Enable ADDRESS 0x07
10.0 DAC Port
The CY7C66113CC features a programmable sink current 8 bit port which is also known as DAC port. Each of these port I/O pins
have a programmable current sink. Writing a ‘1’ to a DAC I/O pin disables the output current sink (I
sink
DAC) and drives the I/O
pin HIGH through an integrated 14-kΩ resistor. When a ‘0’ is written to a DAC I/O pin, the I
sink
DAC is enabled and the pull-up
resistor is disabled. This causes the I
sink
DAC to sink current to drive the output LOW. Figure 10-1 shows a block diagram of the
DAC port pin.
The amount of sink current for the DAC I/O pin is programmable over 16 values based on the contents of the DAC Isink Register
(Figure 10-3) for that output pin. DAC[1:0] are high current outputs that are programmable from 3.2 mA to 16 mA (typical).
DAC[7:2] are low current outputs, programmable from 0.2 mA to 1.0 mA (typical).
When the suspend bit in Processor Status and Control Register (Figure 15-1) is set, the Isink DAC block of the DAC circuitry is
disabled. Special care should be taken when the CY7C66113C device is placed in the suspend. The DAC Port Data
Register(Figure 10-2) should normally be loaded with all ‘1’s (Figure 15-1) before setting the suspend bit. If any of the DAC bits
Bit #76543210
Bit Name P1.7 Intr
Enable
P1.6 Intr
Enable
P1.5 Intr
Enable
P1.4 Intr
Enable
P1.3 Intr
Enable
P1.2 Intr
Enable
P1.1 Intr
Enable
P1.0 Intr
Enable
Read/WriteWWWWWWWW
Reset00000000
Figure 9-8. Port 1 Interrupt Enable
Bit #76543210
Bit Name P2.7 Intr
Enable
P2.6 Intr
Enable
P2.5 Intr
Enable
P2.4 Intr
Enable
P2.3 Intr
Enable
P2.2 Intr
Enable
P2.1 Intr
Enable
P2.0 Intr
Enable
Read/WriteWWWWWWWW
Reset00000000
Figure 9-9. Port 2 Interrupt Enable
Bit #76 5 43210
Bit Name Reserved P3.6 Intr Enable
CY7C66113C
only
P3.5 Intr Enable
CY7C66113C
only
P3.4 Intr
Enable
P3.3 Intr
Enable
P3.2 Intr
Enable
P3.1 Intr
Enable
P3.0 Intr
Enable
Read/WriteWW W WWWWW
Reset00 0 00000
Figure 9-10. Port 3 Interrupt Enable
Figure 10-1. Block Diagram of a DAC Pin
V
CC
14 kΩ
Data
Out
Latch
Internal
Data Bus
DAC Read
DAC Write
Interrupt
Enable
Interrupt Logic
to Interrupt
Controller
Q1
Internal
Buffer
Interrupt
Polarity
Isink
DAC
Isink
Register
4 bits
DAC
I/O Pin
Suspend
(Bit 3 of Register 0xFF)
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Kepco Kit 219-0406, JBW 10W/15W Cable Handbücher

Bedienungsanleitungen und Benutzerhandbücher für Stromversorger Kepco Kit 219-0406, JBW 10W/15W Cable.
Wir stellen 1 PDF-Handbücher Kepco Kit 219-0406, JBW 10W/15W Cable zum kostenlosen herunterladen nach Dokumenttypen zur Verfügung Bedienungsanleitung


Kepco Kit 219-0406, JBW 10W/15W Cable Bedienungsanleitung (1 Seiten)


Marke: Kepco | Kategorie: Power suppliers | Größe: 0.08 MB |

 

Inhaltsverzeichnis

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