AT91SAM7SE256B-AUR Atmel, AT91SAM7SE256B-AUR Datasheet - Page 148

• Manufacturer Part Number: AT91SAM7SE256B-AUR
• Description: IC ARM7 MCU FLASH 256K 128-LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7SE256B-AUR

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: EBI/EMI, I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 88
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: SAM7SE256
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: SPI, USB
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 88
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Processor To Be Evaluated: AT91SAM7SE256B
• Supply Current (max): 60 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

21.7
21.7.1
21.7.1.1
21.7.1.2
148
Implementation Examples
SAM7SE512/256/32 Preliminary
16-bit SDRAM
Hardware Configuration
Software Configuration
(Not used A12)
A[0..14]
D[0..15]
The following configuration must be respected:
The data bus width is to be programmed to 16 bits.
The SDRAM initialization sequence is described in the “SDRAM Device Initialization” section of
the SDRAM Controller.
• Address lines A[0..11], A[13-14], BA0, BA1, SDA10, SDCS_NCS1, SDWE, SDCKE, NBS1,
• Assign the EBI CS1 to the SDRAM controller by setting the bit EBI_CS1A in the EBI Chip
• Initialize the SDRAM Controller depending on the SDRAM device and system bus frequency.
RAS, CAS, and data lines D[8..15] are multiplexed with PIO lines and thus dedicated PIOs
must be programmed in peripheral mode in the PIO controller.
Select Assignment Register.
CFIOR_NBS1_NWR1
SDCS_NCS1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A13
A14
A0
SDA10
SDCKE
SDCK
SDWE
BA0
BA1
CAS
RAS
1%6
1%6
SDA10
BA0
BA1
SDCKE
SDCK
CAS
RAS
SDWE
23
24
25
26
29
30
31
32
33
34
22
35
20
21
36
40
37
38
15
39
17
18
16
19
U1
U1
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
BA0
BA1
A12
N.C
CKE
CLK
DQML
DQMH
CAS
RAS
WE
CS
TSOP54 PACKAGE
MT48LC16M16A2
MT48LC16M16A2
256 Mbits
VDDQ
VDDQ
VDDQ
VDDQ
VSSQ
VSSQ
VSSQ
VSSQ
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
VDD
VDD
VDD
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
VSS
VSS
VSS
2
4
5
7
8
10
11
13
42
44
45
47
48
50
51
53
1
14
27
3
9
43
49
28
41
54
6
12
46
52
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
3V3
C1 100NF
C1 100NF
C2 100NF
C2 100NF
C3 100NF
C3 100NF
C4 100NF
C4 100NF
C5 100NF
C5 100NF
C6 100NF
C6 100NF
C7 100NF
C7 100NF
6222F–ATARM–14-Jan-11