DA6503.005
14 December 2016
Table 2. MAS6503 test register (E1/61HEX) description
Bit
Bit Name
Description
Value
Function
Number
7
6
-
Not used
Selects source of
oscillator trimming bits
Selects external clock
X
0
1
0
1
-
TRIM
Osc trimming values from EEPROM
Osc trimming values from control registers
Internal clock (default)
External clock (OSC input)
can be connected to OSC and the internal
clock oscillator is disabled
5
4-2
1
SEL_EXTCLK
STEST
TEST1 and TEST2
signal selection
000…100
Reserved for internal testing purpose
(TEST1 and TEST2 are outputs)
101…111
No function
MCLK not divided (default)
ENDIV
Enable for extra
system clock divider
0
1
MCLK divided by 2
Note: DIV bit of measurement control
register 1 choose extra MCLK division by 4
OSC is on only during conversion (default)
OSC is forced on
0
FOSC
Forces the oscillator
on without conversion
0
1
X = Don’t care
14 (34)
MAS [ MICRO ANALOG SYSTEMS ]
