參數資料
型號: M50FW016N5G
廠商: 意法半導體
英文描述: 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory
中文描述: 16兆位的2Mb × 8,統一座3V電源閃存固件集線器
文件頁數: 6/45頁
文件大?。?/td> 673K
代理商: M50FW016N5G
M50FW016
14/45
Table 5. FWH Bus Write Field Definitions (Single Byte)
Figure 6. FWH Bus Write Waveforms (Single Byte)
Clock
Cycle
Number
Clock
Cycle
Count
Field
FWH0-
FWH3
Memory
I/O
Description
1
START
1110b
I
On the rising edge of CLK with FWH4 Low, the contents of
FWH0-FWH3 indicate the start of a FWH Write Cycle.
2
1
IDSEL
XXXX
I
Indicates which FWH Flash Memory is selected. The value
on FWH0-FWH3 is compared to the IDSEL strapping on the
FWH Flash Memory pins to select which FWH Flash
Memory is being addressed.
3-9
7
ADDR
XXXX
I
A 28-bit address phase is transferred starting with the most
significant nibble first.
10
1
MSIZE
0000b
I
Always 0000b (single byte transfer).
11-12
2
DATA
XXXX
I
Data transfer is two cycles, starting with the least significant
nibble.
13
1
TAR
1111b
I
The host drives FWH0-FWH3 to 1111b to indicate a
turnaround cycle.
14
1
TAR
1111b
(float)
O
The FWH Flash Memory takes control of FWH0-FWH3
during this cycle.
15
1
SYNC
0000b
O
The FWH Flash Memory drives FWH0-FWH3 to 0000b,
indicating it has received data or a command.
16
1
TAR
1111b
O
The FWH Flash Memory drives FWH0-FWH3 to 1111b,
indicating a turnaround cycle.
17
1
TAR
1111b
(float)
N/A
The FWH Flash Memory floats its outputs and the host takes
control of FWH0-FWH3.
AI03441
CLK
FWH4
FWH0-FWH3
Number of
clock cycles
START
IDSEL
ADDR
MSIZE
DATA
TAR
SYNC
TAR
11712212
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