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參數(shù)資料
| 型號： | ADuC812 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 12-Bit ADC with Embedded FLASH MCU(12位8通道A/D轉換器) |
| 中文描述： | 12位ADC，嵌入式閃存微控制器（12位8通道的A / D轉換器） |
| 文件頁數(shù)： | 13/31頁 |
| 文件大?。?/td> | 543K |
| 代理商： | ADUC812 |
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REV. 0
ADuC812
–
13
–
V
DD
GND
P3
PSEN
RST
XTAL1
XTAL2
P0
P1
P2
ALE
ADuC812
+5V
PROGRAM MODE
(SEE TABLE V)
GND
V
DD
PROGRAM
DATA
(D0
–
D7)
PROGRAM
ADDRESS
(A0
–
A13)
(P2.0 = A0)
(P1.7 = A13)
WRITE ENABLE
STROBE
Figure 10. Flash/EE Memory Parallel Programming
Table V shows the normal parallel programming modes that can
be configured using Port 3 bits.
Table V. Flash Memory Parallel Programing Modes
Port Pins
.7
.6
(P3.0–P3.7)
.4
.3
.5
.2
.1
.0
Programming Mode
1
X
X
X
0
0
0
1
Erase Flash Program
Erase Flash User
Read Manufacture and
Chip ID
Program Byte
Read Byte
Reserved
Reserved
Redundant
1
X
X
X
0
0
1
1
1
1
1
1
Any Other Code
X
X
X
X
X
X
X
X
X
X
X
X
0
0
1
1
1
1
0
0
0
1
0
1
1
1
1
1
U
sing the Flash/EE Data Memory
The user Flash/EE data memory array consists of 640 bytes that
are configured into 160 (00H to 9FH), 4-byte pages as shown in
Figure 11.
9FH
BYTE 1
BYTE 2
BYTE 3
BYTE 4
00H
BYTE 1
BYTE 2
BYTE 3
BYTE 4
Figure 11. User Flash/EE Memory Configuration
As with other user peripherals the interface to this memory
space is via a group of registers mapped in the SFR space. A
group of four data registers (EDATA1-4) are used to hold the
4-byte page data just accessed. EADRL is used to hold the 8-bit
address of the page to be accessed. Finally, ECON is an 8-bit
control register that may be written with one of five Flash/EE
memory access commands to enable various read, write, erase
and verify modes.
The program memory array can be programmed in one of two
modes, namely:
Serial Downloading (In-Circuit Programming)
As part of its factory boot code, the ADuC812 facilitates serial
code download via the standard UART serial port. Serial down-
load mode is automatically entered on power-up if the external
pin,
PSEN
, is pulled low through an external resistor as shown
in Figure 9. Once in this mode, the user can download code to
the program memory array while the device is sited in its target
application hardware. A PC serial download executable is pro-
vided as part of the ADuC812 QuickStart development system.
The Serial Download protocol is detailed in a MicroConverter
Applications Note available from ADI.
1k
PSEN
ADuC812
PULL
PSEN
LOW DURING RESET TO
CONFIGURE THE ADuC812
FOR SERIAL DOWNLOAD MODE
Figure 9. Flash/EE Memory Serial Download Mode
Programming
Parallel Programming
The parallel programming mode is fully compatible with con-
ventional third party Flash or EEPROM device programmers. A
block diagram of the external pin configuration required to
support parallel programming is shown in Figure 10. In this
mode Ports P0, P1 and P2 operate as the external data and
address bus interface, ALE operates as the Write Enable strobe
and Port P3 is used as a general configuration port that config-
ures the device for various program and erase operations during
parallel programming. The high voltage (12 V) supply required
for Flash programming is generated using on-chip charge pumps
to supply the high voltage program lines.
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| ADUC812BCP | 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 8KB Flash 3.3V/5V 56-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:8BIT CISC 8KB FLASH 16MHZ 3.3/5V 52PQFP - Bulk |
| ADUC812BCP-REEL | 制造商:Analog Devices 功能描述:MCU 8-bit ADuC8xx 8052 CISC 8KB Flash 3.3V/5V 56-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:12-BIT ADC WITH EMBEDDED MCU I.C. - Tape and Reel |
| ADUC812BCPZ | 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 8KB Flash 3.3V/5V 56-Pin LFCSP EP |
| ADUC812BCPZ-REEL | 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 8KB Flash 3.3V/5V 56-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:MCU 8BIT CISC 8KB FLASH 3.3V/5V 56LFCSP EP - Tape and Reel |
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