zic2410 California Eastern Laboratories, zic2410 Datasheet - Page 54

• Manufacturer Part Number: zic2410
• Description: Single-chip Solution, Compliant With Zigbee
• Manufacturer: California Eastern Laboratories

1.7.12 4­CHANNEL 8­BIT SENSOR ADC
This block monitors external sensor output and converts the external analog signal into the
corresponding digital value. The output of the sensor ADC is 8-bit wide and sampling frequency
is fixed to 8KHz. For the Sensor ADC control register, refer to the SADCCON (0x22AB),
SADCVALH (0x22AC), SADCVALL (0x22AD), SADCBIASH (0x22AE), and SADCBIASL
(0x22AF).
SADCCON (SENSOR ADC CONTROL REGISTER, 0x22AB)
This register controls sensor ADC operation.
SADCVALH (SENSOR ADC OUTPUT VALUE HIGH DATA REGISTER, 0x22AC)
This register stores the output value of sensor ADC (SADCVAL). SADCVAL, which is a 15bit unsigned
integer value, is stored in the SADCVALH and SADCVALL register. SADCVALH stores 8 bit MSB of
SADCVAL (SADCVAL [14:7]).
5:4
3:0
Bit
7
6
Rev A
SADCDONE
SADCREF
SADCEN
SADCCH
Name
Sensor ADC Enable
SSADCCH
When the values of the SADCVALH and SADCVALL register are
updated, SADCDONE is set to ‘1’.
SADCREF
others
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
00
01
10
11
Select the reference voltage for the sensor ADC.
Select the input channel of sensor ADC
Reference
Table 33– Sensor ADC Registers
ACH0, ACH1
ACH2, ACH3
Temperature
External
Internal
Internal
Document No. 0005-05-07-00-000
Monitor
Sensor
Battery
ACH0
ACH1
ACH2
ACH3
Input
GND
VDD
ZIC2410 Datasheet
Descriptions
BOT = ACH3(ACH3 < ACH2)
VMID = (ACH2+ACH3)/2
TOP = ACH2(0V~1.5V)
VMID = (VDD+GND)/2
TOP = VDD(1.5V)
temperature sensor
Embedded battery
Just for calibration
Just for calibration
VMID = 0.75V
Differential input
Differential input
Description
BOT = GND
TOP = 1.2V
BOT = 0.3V
Reserved
Description
Single input
Single input
Single input
Single input
Embedded
Reserved
monitor
R/W
Page 54 of 119
RW
RW
RW
RO
Reset
Value
0
0
0
0