SN32F280 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 214
Version 1.1
18.5.2 Non-multiplexed N-bit Address 16-bit Data Mode (A
N
D16)
N-bit address and 16-bit data is supported, 16-bit data is located on the 16 AD lines. The addresses are located on the A
lines. A1D16 Mode is also called 8080 16-bit mode.
Since the internal AHB address (HADDR) is a byte (8-bit) address whereas the 16-bit width of external device is
addressed in words (16-bit), in case of a 16-bit external device width, the EBI will internally use HADDR[N:1] to generate
the address EBI_A[N-1:0] for external device.
- Read timing waveform in the A
N
D16 mode for the case in which N address lines on EBI_A have been enabled:
A[N-1:0]
ADDR[N:1]
DATA[15:0]
RDSETUP
(0, 1, 2, …)
RDSTRB
(1, 2, 3, …)
RDHOLD
(0, 1, 2, …)
AD[15:0]
CSn
OE
- Write timing waveform in the A
N
D16 mode for the case in which N address lines on EBI_A have been enabled:
A[N-1:0]
ADDR[N:1]
WESETUP
(0, 1, 2, …)
WESTRB
(1, 2, 3, …)
WEHOLD
(0, 1, 2, …)
AD[15:0]
CSn
WE
DATA[15:0]
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