AD7813YRUZ-REEL7 Analog Devices Inc, AD7813YRUZ-REEL7 Datasheet - Page 10

• Manufacturer Part Number: AD7813YRUZ-REEL7
• Description: 10 BIT, SINGLE, PARALLEL,ADC I.C.
• Manufacturer: Analog Devices Inc

Specifications of AD7813YRUZ-REEL7

• Number Of Bits: 10
• Sampling Rate (per Second): 400k
• Data Interface: Parallel
• Number Of Converters: 1
• Power Dissipation (max): 17.5mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7813
MICROPROCESSOR INTERFACING
The parallel port on the AD7813 allows the device to be inter-
faced to a range of many different microcontrollers. This section
explains how to interface the AD7813 with some of the more
common microcontroller parallel interface protocols.
AD7813 to 8051
Figure 16 shows a parallel interface between the AD7813 and
the 8051 microcontroller. The BUSY signal on the AD7813 pro-
vides an interrupt request to the 8051 when a conversion begins.
Port 0 of the 8051 may serve as an input or output port, or as in
this case when used together, may be used as a bidirectional
low-order address and data bus. The address latch enable out-
put of the 8051 is used to latch the low byte of the address dur-
ing accesses to the device, while the high-order address byte is
supplied from Port 2. Port 2 latches remain stable when the
AD7813 is addressed, as they do not have to be turned around
(set to 1) for data input as is the case for Port 0.
AD7813 to PIC16C6x/7x
Figure 17 shows a parallel interface between the AD7813 and the
PIC16C64/65/74. The BUSY signal on the AD7813 provides
an interrupt request to the microcontroller when a conversion
begins. Of the PIC16C6x/7x range of microcontrollers only the
PIC16C64/65/74 can provide the option of a parallel slave port.
Port D of the microcontroller will operate as an 8-bit wide
parallel slave port when control bit PSPMODE in the TRISE
register is set. Setting PSPMODE enables the port pin RE0
to be the RD output and RE2 to be the CS output. For this
functionality, the corresponding data direction bits of the
TRISE register must be configured as outputs (reset to 0).
See PIC16/17 Microcontroller User Manual.
8051*
AD0–AD7
A8–A15
Figure 16. Interfacing to the 8051
ALE
INT
RD
*
ADDITIONAL PINS OMITTED FOR CLARITY
LATCH
DECODER
DB0–DB7
CS
RD
BUSY
AD7813
*
–10–
AD7813 to ADSP-21xx
Figure 18 shows a parallel interface between the AD7813 and
the ADSP-21xx series of DSPs. As before, the BUSY signal on
the AD7813 provides an interrupt request to the DSP when a
conversion begins.
PIC16C6x/7x*
ADSP-21xx*
PSP0–PSP7
Figure 17. Interfacing to the PIC16C6x/7x
Figure 18. Interfacing to the ADSP-21xx
A13–A0
D7–D0
DMS
IRQ
INT
CS
RD
RD
*
*
ADDITIONAL PINS OMITTED FOR CLARITY
ADDITIONAL PINS OMITTED FOR CLARITY
EN
ADDRESS
DECODE
LOGIC
DB0–DB7
CS
RD
DB0–DB7
CS
RD
BUSY
BUSY
AD7813
AD7813
REV. C
*
*