AK8140A Datasheet, PDF (25/45 Pages) Asahi Kasei Microsystems – Programmable Clock Generator

CLK4_CMOS ： CLK4 Output Level Selection LVDS/CMOS
CLK4_CMOS bit sets CLK4 output level, LVDS or LVCMOS.
CLK4_CMOS
0
1
CLK4 Output Setting
LVDS output
LVCMOS output
AK8140A
SPICON ： Operation mode selection for pin 23/24
SPICON bit selects the operational mode of a dual functional pin 23/24.
If '1' is written, pin 23/24 become “Programmable Control pin S1/S2”, and impossible to
use it as a serial programming terminal. *1
However, S1/S2 pins can be temporarily used as a serial programming terminal,
SDA/SCL by connecting VDDO1 to VSS.
These are the bits of the Control Terminal Register. The user can predefine up to eight
different control settings. These settings then can be selected by the external control
pins, S0, S1, and S2.
*1 the setup of SPICON= "1" becomes effective by writing ’1’ to “SPICON_SET” bit.
SPICON
Pin 23/24 operation
Serial programming interface*2
0
Pin 23:SDA
Pin24:SCL
Programmable control pin*3
1
Pin 23:S2
Pin24:S1
*2 Address：00h,01h becomes effective.
*3 Pin 23/24 can control the Device Setting defined in the table on page
14.
SPICON_SET ：SPICON Validation
“SPICON_SET” validates a setup of” SPICON" bit .
A setup written in SPICON by writing '1' in this bit becomes effective.
* When Set “SPICON_SET” =’1’, “SPICON_SET” bit should be written last.
SPICON_SET
SPICON Setting
0
-
1
SPICON bit is Effective *1
*1 “SPICON_SET” bit should be written last.
Setup of “SPICON” bit is validated by the rising edge of a “SPICON_SET”
bit.
draft-E-06
- 25 -
Sep -12