1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
DD
CC
BB
AA
Title
NumberRevisionSize
A3
Date:2005-6-27Sheet of
File:G:\BackUp of My\..\TEST2.SchDocDrawn By:
PB0 (XCK/T0)
40
PB1 (T1)
41
PB2 (AIN0/INT2)
42
PB3 (AIN1/OC0)
43
PB4 (SS)
44
PB5 (MOSI)
1
PB6 (MISO)
2
PB7 (SCK)
3
RESET
4
PD0 (RXD)
9
PD1 (TXD)
10
PD2 (INT0)
11
PD3 (INT1)
12
PD4 (OC1B)
13
PD5 (OC1A)
14
PD6 (ICP)
15
PD7 (OC2)
16
XTAL2
7
XTAL1
8
GND
6
PC0 (SCL)
19
PC1 (SDA)
20
PC2 (TCK)
21
PC3 (TMS)
22
PC4 (TDO)
23
PC5 (TDI)
24
PC6 (TOSC1)
25
PC7 (TOSC2)
26
AREF
29
AVCC
27
GND
28
PA7 (ADC7)
30
PA6 (ADC6)
31
PA5 (ADC5)
32
PA4 (ADC4)
33
PA3 (ADC3)
34
PA2 (ADC2)
35
PA1 (ADC1)
36
PA0 (ADC0)
37
VCC
5
VCC
17
GND
18
VCC
38
GND
39
U1
ATmega16L-8AI
LS1
400ST160
LS2
400SR160
100pF
CT1
谐振微调
Vbat
VDD
Signal_ICP
Signal_ADC7
Vbat
KB_ADC6
Vbat
KB_nINT1
Vbat_ADC5
KB_ADC6
Signal_ADC7
RX_nPOWER
Vbat
Vbat
MES_nINT0
KB_nINT1
MES_nINT0
Signal_ICP
TX_OC0
Vbat
Vbat
TCK
TDO
TMS
TDI
TX_OC0
灵敏度
66mV@3.3V 2% VCC
峰值检波
谐振于40KHz
VDD
发送
60Vp-p
Variable Gain = 1~50
DP_nCS
DP_nCS
RX_nPOWER
激光指示
按键中断触发
(
唤醒
>5uS)
按键键值检测
可以扩展多达数十个按键
Variable Gain = 1~50
RXD
TXD
ADC0
ADC1
ADC2
ADC3
ADC4
Ultrasonic Ranging Finder
原理图
按键中断触发
(
唤醒
)
TGC
增益控制
VGA 256
级增益
1----2500
倍可调
(MAX4477 10MHz GBW Gv=250 @40KHz )
信号峰值分析
(104uS
采样
)
按键唤醒
(
低电平
)
休眠省电模式
激光指示目标
默认
9
个按键
-------10bitADC
采样，可扩展数十个按
ü
保留
ISP / JTAG / USART
接口
保留
5 x ADC
接口
保留
1 x 8bit PWM
保留
3 x GPIO
接口
共享
SPI / IIC
接口
峰值采样分析
104uS@8MHz
7
5
6
2
U2B
MAX4477
1
3
2
1
U2A
MAX4477
SDA
1
SCL
2
Tout
3
GND
4
A2
5
A1
6
A0
7
VDD
8
U6
DS1721
Vbat
VDD
CS1
1
U/D1
2
U/D2
3
VDD
4
W1
5
H1
6
L1
7
CS2
14
INC1
13
INC2
12
GND
11
W2
10
H2
9
L2
8
U4
MAX5455 100K
VDD
SCL
SDA
SCL
SDA
4u7
CG2
INT2
OC2
PC6
PC7
MOSI
RST
SCK
MISO
LCD_nCS
MOSI
SCK
LCD_D/C
LCD_nRES
VDD
3
1
4
U3
LMX331
S0
MEASURE
S1
S2
S3
S4
S5
S6
S7
S8
1K
RC3
2K
RA3
*K
RA4
1K
RA5
*KRA7
2KRA6
2K
RA8
10K
RA13
*K
RA10
1K
RA9
47K
RA11
100K
RA14
1K
RA12
10K
RA17
10K
RA16
100R
RA18
470K
RA1
470K
RA2
1K
RA19
10K
RA20
10K
RA15
1K
RB1
1K
RB2
1K
RC1
10K
RC2
4K7
RD1
4K7
RD2
10K
RE1
1K
RE2
1K
RE3
1K
RE4
1K
RE5
1K
RE6
1K
RE7
1K
RE8
100K
RE9
4K7
RF1
4K7
RF2
4K7
RF3
4K7
RF4
1K
R0
470R
RG1
1KRG2
1KRG3
1KRG4
1KRG5
1KRG6
1 2
3 4
5 6
7 8
9 10
P1ISP
1 2
3 4
5 6
7 8
9 10
P4JTAG
10uH
L1
100nF
CA1
100nF
CA4
100nF
CA5
100nF
CA2
100nF
CA3
100nF
CA6
100nF
CA7
100nF
CA9
100nF
CB1
100nF
CE1
470nF
CE2
22pF
CY1
22pF
CY2
100nF
CC1
100nF
CD1
100nF
C2
100nF
C4
100nF
C5
DZ1
3V3
47u
CB2
10u
CA8
8MHz
1 2
Y1
32768Hz
1 2
Y2
LD1
Laser
1
3
2
4
T1
Trans_X
VDD
SCLK
SDIN
D/C
SCE
GND
VLCD
RES
SP1
SP2
LCDNOKIA3310
Q4
Q1
PNP
AVDD
Vo1
Vo2
SIgnal_ICP
signal_ADC7
signal_in
100nF
CG1
4u7
CG3
100K
R1
100K
R2
100nF
C1
VDD
Tout
BAT
3.6V
VREF
MOSI
MISO
SCK
SCL
SDA
nRESET
47RRG7
Tout
RX_nPOWER
TX_OC0
MES_nINT0
KB_nINT1
KB_ADC6
AVCC
4
3
1
SHDN
5
U5
MAX4475
2
1
7, 8
Q2A
IRF7328
4
3
5, 6
Q2B
IRF7328
RXD
TXD
INT2
ADC0
ADC1
ADC2
ADC3
ADC4
PC6
PC7
XTAL2
XTAL1
OC2
