參數(shù)資料
型號(hào)： DS80C410-FNY
英文描述： Network Microcontrollers with Ethernet and CAN
中文描述： 網(wǎng)絡(luò)微控制器與以太網(wǎng)和CAN
文件頁數(shù)： 46/102頁
文件大?。?/td> 2637K
代理商： DS80C410-FNY
DS80C410/DS80C411 Network Microcontrollers with Ethernet and CAN
Table 6. External Memory Addressing Pin Assignments
46 of 102
SIGNAL
A21
A20
A19
A18
A17
A16
A15–A8
A7–A0
MULTIPLEXED (
P6.5
P6.4
P4.7
P4.6
P4.5
P4.4
P2.7–P2.0
P0.7–P0.0
MUX
= 0)
DEMULTIPLEXED (
P6.5
P6.4
P4.7
P4.6
P4.5
P4.4
P2.7–P2.0
P7.7–P7.0
MUX
= 1)
ADDRESS
DATA
D7–D0
P0.7–P0.0
P0.7–P0.0
CE7
CE6
CE5
CE4
CE3
CE2
CE1
CE0
PCE3
PCE2
PCE1
PCE0
P6.3
P6.2
P6.1
P6.0
P4.3
P4.2
P4.1
P4.0
P5.7
P5.6
P5.5
P5.4
P6.3
P6.2
P6.1
P6.0
P4.3
P4.2
P4.1
P4.0
P5.7
P5.6
P5.5
P5.4
CHIP ENABLES
PERIPHERAL CHIP
ENABLES
Combined Program/Data Memory Access
The DS80C410 can be configured to allow data memory access (MOVX) to the program memory area. This feature
might be useful, for example, when modifying lookup tables or supporting in-application programming of code
space. Setting any of the
PDCE7-4
(MCON1.3-0) or
PDCE3-0
(MCON.3-0) bits enables combined program/data
memory access and causes the corresponding chip-enable (
CE
) signal to function for both MOVC and MOVX
operations. When combined program/data memory access is enabled, the peripheral chip-enable (
PCE
) signals
previously assigned to that data memory space are disabled. Write access to combined program and data memory
blocks is controlled by the
WR
signal, and read access is controlled by the
PSEN
signal. This feature is especially
useful if the design achieves in-system reprogrammability through external flash memory, in which a single device
is accessed through both MOVC instructions (program fetch) and MOVX write operations (updates to code
memory).
Figure 1
demonstrates how setting
PDCE
bits can alter external memory data access.
When combined program/data memory access is enabled, there is the potential to inadvertently modify code that a
user meant to leave fixed. For this reason, the DS80C410 provides the ability to write protect the first 0–16kB of
memory accessible through each of the chip enables
CE3
,
CE2
,
CE1
, and
CE0
. The write-protection feature for
each chip enable is invoked by setting the appropriate WPE3–0 (MCON2.3-0) bit. The protected range is defined
by the WPR2–0 (MCON2.6–4) bit settings as shown in
Table 7
. Any MOVX instructions attempting to write to a
protected area are disallowed and set the write-protected interrupt flag (WPIF–MCON2.7), causing a write-protect
interrupt if enabled.
Table 7. Write-Protection Range
MCON2.6–4
000
001
010
011
100
101
110
111
RANGE PROTECTED (kB)
0 to 2
0 to 4
0 to 6
0 to 8
0 to 10
0 to 12
0 to 14
0 to 16
相關(guān)PDF資料
PDF描述
DS80C411-FNY Network Microcontrollers with Ethernet and CAN
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS80C410-FNY+ 功能描述:8位微控制器 -MCU Network MCU w/Ethernet & CAN RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS80C411 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Network Microcontrollers with Ethernet and CAN
DS80C411-FNY 功能描述:8位微控制器 -MCU Network MCU w/Ethernet & CAN RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS80C411-FNY+ 功能描述:8位微控制器 -MCU Network MCU w/Ethernet & CAN RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS80CH11 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:System Energy Manager
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