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参数资料
| 型号： | DS2250-8-16 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Microcontroller |
| 英文描述： | 8-BIT, 16 MHz, MICROCONTROLLER, DMA40 |
| 封装： | SIMM-40 |
| 文件页数： | 19/20页 |
| 文件大小： | 594K |
| 代理商： | DS2250-8-16 |
DS2250(T)
8 of 20
COMMAND
FUNCTION
C
Return CRC-16 checksum of embedded RAM
D
Dump Intel hex File
F
Fill embedded RAM block with constant
K
Load 40-bit encryption key
L
Load Intel hex file
R
Read MCON register
T
Trace (Echo) incoming Intel hex data
U
Clear Security Lock
V
Verify Embedded RAM with incoming Intel hex
W
Write MCON register
Z
Set security lock
P
Put a value to a port
G
Get a value from a port
Table 1 summarizes the selection of the available Parallel Program Load cycles. The timing associated
with these cycles is illustrated in the electrical specs.
PARALLEL PROGRAM LOAD CYCLES Table 1
MODE
RST
PSEN
PROG
EA
P2.7
P2.6
P2.5
Program
1
0
VPP
10
X
Security Set
1
0
VPP
11
X
Verify
1X
X
1
00
X
Prog Expanded
1
0
VPP
01
0
Verify Expanded
1
0
1
0
1
0
Prog MCON or Key registers
1
0
VPP
01
1
Verify MCON registers
1
0
1
0
1
The Parallel Program cycle is used to load a byte of data into a register or memory location within the
DS2250(T). The Verify cycle is used to read this byte back for comparison with the originally loaded
value to verify proper loading. The Security Set cycle may be used to enable and the software security
feature. One may also enter bytes for the MCON register or for the five encryption registers using the
Program MCON cycle. When using this cycle, the absolute register address must be presented at Ports 1
and 2 as in the normal program cycle (Port 2 should be 00H). The MCON contents can likewise be
verified using the Verify MCON cycle.
When the DS2250(T) first detects a Parallel Program Strobe pulse or a Security Set Strobe pulse while in
the Program Load Mode following a power-on reset, the internal hardware of the device is initialized so
that an existing 4-kbyte program can be programmed into a DS2250(T) with little or no modification.
This initialization automatically sets the range address for 8 kbytes and maps the lowest 4-kbyte bank of
embedded RAM as program memory. The next 4 kbytes of embedded RAM are mapped as data memory.
In order to program more than 4 kbytes of program code, the Program/Verify Expanded cycles can be
used. Up to 32 kbytes of program code can be entered and verified. Note that the expanded 32 kbyte
Program/Verify cycles take much longer than the normal 4 kbyte Program/Verify cycles.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2250-64-16 | 8-BIT, 16 MHz, MICROCONTROLLER, DMA40 |
| DS2250T-8-16 | 8-BIT, 16 MHz, MICROCONTROLLER, DMA40 |
| DS2250T-64-16 | 8-BIT, 16 MHz, MICROCONTROLLER, DMA40 |
| DS2250T-32-12 | 8-BIT, 12 MHz, MICROCONTROLLER, SMA40 |
| DS2250-32-12 | 8-BIT, 12 MHz, MICROCONTROLLER, SMA40 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2250-8-8 | 制造商:Maxim Integrated Products 功能描述:SIPSTIK, MICRO 8KX8 8MHZ - Rail/Tube |
| DS2250T | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Soft Microcontroller Module |
| DS2250T08-08 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| DS2250T08-12 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| DS2250T-08-16 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
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