Panasonic F77G User Manual page 479

15-2-2 Control Registers
A/D Converter Control Register 0 (ANCTR0)
7 6
ANSH1 ANSH0
ANCTR0
Figure 15-2-1 A/D Converter Control Register 0 (ANCTR0 : x'03FB0', R/W)
5 4 3 2
ANCK1 ANCK0 ANLADE -
1 0
(At reset : 0 0 0 0 - - - )
- -
ANLADE
0
1
ANCK1
0
1
as 800 ns
*
ANSH1
0
1
Sampling and holding time is decided by
*
the input impedance at analog input.
T means the cycle for A/D conversion clock.
AD
Chapter 15
A/D ladder resistance control
A/D ladder resistance OFF
A/D ladder resistance ON
ANCK0
A/D conversion clock (ftad=1/T
0
fs/2
1 fs/4
0 fs/8
fx 2
1
T 15.26 s
AD
ANSH0
Sample and hold time
0
T 2
AD
1 T 6
AD
T 18
0
AD
Reserved
1
Control Registers
A/D Converter
)
AD
XV - 5