參數(shù)資料
型號: AT91M42800A-33CJ
廠商: Atmel
文件頁數(shù): 24/27頁
文件大?。?/td> 0K
描述: IC ARM7 MCU 144 BGA
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 160
系列: AT91
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 33MHz
連通性: EBI/EMI,SPI,UART/USART
外圍設(shè)備: WDT
輸入/輸出數(shù): 54
程序存儲器類型: ROMless
RAM 容量: 8K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 144-LFBGA
包裝: 托盤
配用: AT91EB42-ND - KIT EVAL FOR ARM AT91M42800A
6
1779ES–ATARM–14-Apr-06
AT91M42800A
3.
Pin Description
Table 3-1.
AT91M42800A Pin Description
Module
Name
Function
Type
Active
Level
Comments
EBI
A0 - A23
Address Bus
Output
All valid after reset
D0 - D15
Data Bus
I/O
CS4 - CS7
Chip Select
Output
High
A23 - A20 after reset
NCS0 - NCS3
Chip Select
Output
Low
NWR0
Lower Byte 0 Write Signal
Output
Low
Used in Byte Write option
NWR1
Lower Byte 1 Write Signal
Output
Low
Used in Byte Write option
NRD
Read Signal
Output
Low
Used in Byte Write option
NWE
Write Enable
Output
Low
Used in Byte Select option
NOE
Output Enable
Output
Low
Used in Byte Select option
NUB
Upper Byte Select (16-bit SRAM)
Output
Low
Used in Byte Select option
NLB
Lower Byte Select (16-bit SRAM)
Output
Low
Used in Byte Select option
NWAIT
Wait Input
Input
Low
BMS
Boot Mode Select
Input
Sampled during reset
PME
Protect Mode Enable
Input
High
PIO-controlled after reset
AIC
IRQ0 - IRQ3
External Interrupt Request
Input
PIO-controlled after reset
FIQ
Fast External Interrupt Request
Input
PIO-controlled after reset
TC
TCLK0 - TCLK5
Timer External Clock
Input
PIO-controlled after reset
TIOA0 - TIOA5
Multi-purpose Timer I/O Pin A
I/O
PIO-controlled after reset
TIOB0 - TIOB5
Multi-purpose Timer I/O Pin B
I/O
PIO-controlled after reset
USART
SCK0 - SCK1
External Serial Clock
I/O
PIO-controlled after reset
TXD0 - TXD1
Transmit Data Output
Output
PIO-controlled after reset
RXD0 - RXD1
Receive Data Input
Input
PIO-controlled after reset
SPIA
SPIB
SPCKA/SPCKB
Clock
I/O
PIO-controlled after reset
MISOA/MISOB
Master In Slave Out
I/O
PIO-controlled after reset
MOSIA/MOSIB
Master Out Slave In
I/O
PIO-controlled after reset
NSSA/NSSB
Slave Select
Input
Low
PIO-controlled after reset
NPCSA0 - NPCSA3
NPCSB0 - NPCSB3
Peripheral Chip Selects
Output
Low
PIO-controlled after reset
PIO
PA0 - PA29
Programmable I/O Port A
I/O
Input after reset
PB0 - PB23
Programmable I/O Port B
I/O
Input after reset
ST
NWDOVF
Watchdog Timer Overflow
Output
Low
Open drain
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