SAM3A4C Atmel Corporation, SAM3A4C Datasheet - Page 438
SAM3A4C
Manufacturer Part Number
SAM3A4C
Description
Manufacturer
Atmel Corporation
- Current page: 438 of 1465
- Download datasheet (26Mb)
26.9.2.3
438
438
SAM3X/A
SAM3X/A
Signal Multiplexing
Figure 26-6. Connection of 2 x 8-bit Devices on a 16-bit Bus: Byte Write Option
Depending on the byte access type (BAT), only the write signals or the byte select signals are
used. To save IOs at the external bus interface, control signals at the SMC interface are multi-
plexed.
access type.
For 16-bit devices, bit A0 of address is unused. When Byte Select Option is selected, NWR1 is
unused. When Byte Write option is selected, NBS0 is unused.
Table 26-5.
Signal Name
Device Type
Byte Access Type (BAT)
NBS0_A0
NWE_NWR0
NBS1_NWR1
A1
Table 26-5
SMC Multiplexed Signal Translation
shows signal multiplexing depending on the data bus width and the byte
SMC
D[15:8]
NCS[3]
A[24:2]
D[7:0]
NWR0
NWR1
NRD
A1
Byte Select
1x16-bit
NBS0
NBS1
NWE
A1
16-bit Bus
Byte Write
2 x 8-bit
NWR0
NWR1
A1
A[23:1]
A[0]
Write Enable
Read Enable
Memory Enable
D[15:8]
A[23:1]
Write Enable
Read Enable
Memory Enable
D[7:0]
A[0]
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
8-bit Bus
1 x 8-bit
NWE
A0
A1
Related parts for SAM3A4C
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
AT91SAM ARM-based Flash MCU
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: