Datasheet

8
1779ES–ATARM–14-Apr-06
AT91M42800A
4. Block Diagram
Figure 4-1. AT91M42800A
ARM7TDMI
Core
Embedded
ICE
Reset
EBI: External
Bus Interface
ASB
Controller
AIC: Advanced
Interrupt Controller
AMBA™ Bridge
TC: Timer/
Counter
Block 0
TC0
TC1
TC2
USART0
USART1
2 PDC
Channels
2 PDC
Channels
APB
ASB
P
I
O
P
I
O
NRST
D0-D15
A1-A19
A0/NLB
NCS0
NCS1
PB6/TCLK0
PB9/TCLK1
PB12/TCLK2
PB7/TIOA0
PB8/TIOB0
PB10/TIOA1
PB11/TIOB1
PB13/TIOA2
PB14/TIOB2
XIN
PA25/MCKO
PA1/IRQ1
PA2/IRQ2
PA3/IRQ3
PA4/FIQ
PA5/SCK0
PA6/TXD0
PA7/RXD0
PA8/SCK1
PA9/TXD1/NTRI
PA10/RXD1
TMS
TDO
TDI
TCK
NTRST
SPIA: Serial
Peripheral
Interface
NWDOVF
TC: Timer/
Counter
Block 1
TC3
TC4
TC5
PB15/TCLK3
PB18/TCLK4
PB21/TCLK5
PB16/TIOA3
PB17/TIOB3
PB19/TIOA4
PB20/TIOB4
PB22/TIOA5
PB23/TIOB5
PA29/PME
PB1/NCS3
PA0/IRQ0
PA12/MISOA
PA13/MOSIA
PA14/NPCSA0/NSSA
PA15/NPCSA1
PA11/SPCKA
PA16/NPCSA2
PA17/NPCSA3
NRD/NOE
NWR0/NWE
NWR1/NUB
NWAIT
PB0/NCS2
Chip ID
EBI User
Interface
JTAGSEL
JTAG
Internal RAM
8K Bytes
Clock
Generator
PLLRCA
PLLRCB
XOUT
PB3/A21/CS6
PB2/A20/CS7
PB5/A23/CS4
PB4/A22/CS5
System
Timers
Watchdog
Real-time
Period
Interval
PIO: Parallel I/O Controller
2 PDC
Channels
SPIB: Serial
Peripheral
Interface
PA19/MISOB
PA20/MOSIB
PA21/NPCSB0/NSSB
PA22/NPCSB1
PA18/SPCKB
PA23/NPCSB2
PA24/NPCSB3
2 PDC
Channels
PMC: Power Management
Controller
PA26
PA27/BMS
MODE0
MODE1
PA28