5V PRECISION DATA ACQUISITION
SUBSYSTEMS
TC530
TC534
PIN DESCRIPTION
(Cont.)
Pin No.
(TC530
28-Pin
PDIP, 300 Mil.)
22
1
Pin No.
(TC530
28-Pin
SOIC)
22
Pin No
(TC534
40-Pin
PDIP)
32
Pin No.
(TC534
44-Pin
PQFP)
30
2
Symbol
V
CCD
Description
Analog Input. Power supply connection for digital logic and
serial port. Proper power-up sequencing is critical, see the
Applications
section.
Input. The negative power supply converter normally runs at
a frequency of 100kHz. This frequency can be slowed down to
reduce quiescent current by connecting an external capacitor
+
between this pin and V
S
. (See
Typical Characteristics).
Analog Input. Power supply connection for the A/D analog
section and DC-DC converter. Proper power-up sequencing is
critical, see the
Applications
section.
Analog Input. Storage capacitor positive connection for the
DC/DC converter.
Analog Input. Ground connection for DC/DC converter.
Analog Input. Storage capacitor negative connection for the
DC/DC converter.
No connect. Do not connect any signal to these pins.
23
23
34
32
OSC
3
4
5
25
25
37
35
V
DD
26
27
28
13, 24
26
27
28
13, 24
38
39
40
36
37
38
CAP
+
AGND
CAP
–
NC
28, 29, 31, 1, 25, 26, 27
33, 35, 36 29, 31, 33,
34, 39, 44,
READ TIMING
WRITE TIMING
t
RS
WRITE DEFAULT TIMING
R/W
t
RD
EOC
R/W
t
LS
D
IN
R/W
t
LDL
D
IN
t
DLS
t
PWL
t
LDS
D
OUT
t
DRS
D
CLK
t
PWL
D
CLK
READ FORMAT
R/W
EOC
6
LSB
D
OUT
EOC OVR SGN MSB
D
CLK
WRITE FORMAT
R/W
7
LSB
D
OUT
MSB
D
CLK
For Polled vs Interrupt Operation and Write Value Modified Cycle Use TC520A Data Sheet Figure 1 & 2.
Figure 1. Serial Port Timing
8
3-53
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
