参数资料
型号: M34518E8SP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDIP32
封装: 8.90 X 28 MM, 1.78 MM PITCH, PLASTIC, SDIP-32
文件页数: 139/162页
文件大小: 1149K
代理商: M34518E8SP
Rev.3.01
2005.06.15
page 76 of 157
REJ03B0008-0301
4518 Group
A/D converter-1
When the TALA instruction is executed, the low-order 2 bits of
register AD is transferred to the high-order 2 bits of register A, si-
multaneously, the low-order 2 bits of register A is “0.”
Do not change the operating mode (both A/D conversion mode
and comparator mode) of A/D converter with the bit 3 of register
Q1 while the A/D converter is operating.
Clear the bit 2 of register V2 to “0” to change the operating mode of
the A/D converter from the comparator mode to A/D conversion mode.
The A/D conversion completion flag (ADF) may be set when the
operating mode of the A/D converter is changed from the com-
parator mode to the A/D conversion mode. Accordingly, set a
value to the register Q1, and execute the SNZAD instruction to
clear the ADF flag.
LA
8
; (02)
TV2A
; The SNZAD instruction is valid ........
LA
0
; (02)
TQ1A
; Operation mode of A/D converter is
changed from comparator mode to A/D
conversion mode.
SNZAD
NOP
: these bits are not used here.
Fig. 72 A/D converter program example-3
Fig. 73 Analog input external circuit example-1
A/D converter-2
Each analog input pin is equipped with a capacitor which is used
to compare the analog voltage. Accordingly, when the analog volt-
age is input from the circuit with high-impedance and, charge/
discharge noise is generated and the sufficient A/D accuracy may
not be obtained. Therefore, reduce the impedance or, connect a
capacitor (0.01
F to 1 F) to analog input pins (Figure 73).
When the overvoltage applied to the A/D conversion circuit may
occur, connect an external circuit in order to keep the voltage
within the rated range as shown the Figure 74. In addition, test
the application products sufficiently.
Sensor
AIN
Apply the voltage withiin the specifications
to an analog input pin.
Sensor
AIN
About 1k
18
19
Fig. 74 Analog input external circuit example-2
相关PDF资料
PDF描述
M34518M2-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP32
M34519M6-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42
M34519M8-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42
M34519E8FP 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO42
M34519M8-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42
相关代理商/技术参数
参数描述
M34518M2-XXXFP 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34518M2-XXXSP 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34518M4-XXXFP 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34518M4-XXXSP 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34518M6-XXXFP 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER