w925e625 ETC-unknow, w925e625 Datasheet - Page 5

• Manufacturer Part Number: w925e625
• Description: 8-bit Cid Microcontroller
• Manufacturer: ETC-unknow

4. PIN DESCRIPTION
TEST/MODE
RESET /V
EA /DATA
SYMBOL
RNGRC
GCFB1
GCFB2
XOUT1
XOUT2
RNGDI
VREF
INN1
INP1
INN2
INP2
XIN1
CAP
VAD
VAS
V
V
DD
SS
PP
I,I/O
I/O
I/O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
TEST pin. In E version (EEPROM type), it works as a Mode pin to select
programming mode. In C version (Mask type), this pin with internal pull-low
resistor.
Set high for normal function. In E version, it works as Data pin. In C version,
this pin with internal pull-high resistor.
RESET pin. A low pulse causes the whole chip reset. In E version, this pin
work as V
with internal pull-high resistor.
Ring Detect Input (Schmitt trigger input). Used for ring detection and line
reversal detection. Must maintain a voltage between VAD and VAS.
Ring RC (Open drain output and Schmitt trigger input). Used to set the time
interval from the end of RNGDI pin to the inactive condition of the RNGON
pin. An external resistor must connected to VAD and a capacitor connected
to V
Must be connected 0.1 F capacitor to V
Reference Voltage. Nominally, V
control op-amp.
Op-amp1 Feed-back Gain Control signal. Select the input gain by connecting
this pin and the INN1 pin with feedback resistor. It is recommended that the
op-amp1 be set to unity gain.
Inverting Input of the gain control op-amp1.
Non-inverting Input of the gain control op-amp1.
Op-amp2 Feed-back Gain Control signal. Select the input gain by connecting
this pin and the INN2 pin with feedback resistor. It is recommended that the
op-amp2 be set to unity gain.
Inverting Input of the gain control op-amp2.
Non-inverting Input of the gain control op-amp2.
Analog voltage supply.
Analog ground.
Digital voltage supply.
Digital ground.
Output pin for main-oscillator. Connected to 3.58MHz crystal for CID function.
Input pin for main-oscillator. Connected to 3.58MHz crystal for CID function.
Output pin for sub-oscillator. Connected to 32.768KHz crystal only. Suggest
to add an external capacitor about 10~30pF to ground (V
of the oscillator.
SS
, the time interval is the RC time constant.
PP
pin, which is a supply programming voltage. In C version, this pin
- 5 -
DESCRIPTION
DD
/2 is used to bias the input of the gain
SS
.
Publication Release Date: July 4, 2005
W925E/C625
SS
) for the accuracy
Revision A10