AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 122

• Manufacturer Part Number: AT91SAM7X128
• Description: MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
• Manufacturer: Atmel

Specifications of AT91SAM7X128

• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 55 MHz
• Ram Size: 32 KB
• Program Memory Size: 128 KB
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 62
• Interface Type: CAN/Ethernet/SPI/I2S/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

Table 20-4.
20.2.4.2
122
Step
1
2
3
4
5
6
AT91SAM7X512/256/128 Preliminary
Programmer Action
Sets MODE and DATA signals
Clears NCMD signal
Waits for RDY low
Releases MODE and DATA signals
Sets NCMD signal
Waits for RDY high
Read Handshaking
Write Handshake
Figure 20-2. Parallel Programming Timing, Write Sequence
For details on the read handshaking sequence, refer to
Figure 20-3.
MODE[3:0]
DATA[15:0]
MODE[3:0]
DATA[15:0]
NVALID
NVALID
NCMD
NCMD
Parallel Programming Timing, Read Sequence
NOE
RDY
NOE
RDY
1
1
Waits for NCMD low
Latches MODE and DATA
Clears RDY signal
Executes command and polls NCMD high
Executes command and polls NCMD high
Sets RDY
Device Action
2
2
Adress IN
ADDR
3
3
4
5
Z
6
Figure 20-3
4
7
Data OUT
8
5
9
and
Data I/O
Input
Input
Input
Input
Input
Input
10
11
Table
X
12
6120H–ATARM–17-Feb-09
20-5.
13
IN