Panasonic FP7 Series, Справочник по командам

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● According to the operation unit [i], [S] is set to the area specified by "[D]+3" (write pointer).
● "[D]+3" (write pointer) is incremented (+1).
● After incrementing, if "[D]+3 (write pointer) is equal to [S] (buffer size)", [D]+3 (write pointer)
is set to 0.
● "[S]+1" (stored data amount) is incremented (+1).
■
Format of data buffer (FIFO)
Buffer size
Stored data amount
Reading pointer
Writing pointer
・・・ Size of the data buffer area
・・・
Stored data amount (by operation unit)
・・・ Relative number from [D]+4
・・・ Relative number from [D]+4
Data buffer area
[D]
[D]+1
[D]+2
[D]+3
・
・
・
・
・
・・
・
■
Processing
1. Set [S] (write data) to the area specified by "[D]+3" (write pointer).
2. "[D]+3" (write pointer) is incremented (+1).
3. Increment (+1) "[D]+1" (stored data amount).
105
5
0
101
103
3
3
102
104
5
0
101
103
DT0
DT1
DT2
DT3
DT4
DT5
DT6
DT7
Example) 16 bits (US, SS)
4
4
102
201
DT0
DT1
DT2
DT3
DT4
DT5
DT6
DT7
201
DT20
DT8 105 DT8
[S]…DT20 [D]…DT0
[D]
[D]+1
[D]+2
[D]+3
[D]+4
[D]+5
[D]+6
[D]+7
[D]+8
(Buffer size)
(Stored data amount)
(Reading pointer)
(0th)
(1st)
(2nd)
(3rd)
(4th)
201
DT20
[D]
[D]+1
[D]+2
[D]+3
[D]+4
[D]+5
[D]+6
[D]+7
[D]+8 ③
Increment (+1)
②
Increment (+1) (Writing pointer)
(Buffer size)
(Stored data amount)
(Reading pointer)
(0th)
(1st)
(2nd)
(3rd)
(4th)
(Writing pointer)
① Because [D]+3 (writing
pointer) points at 3, [S]
is transferred to the 3rd
area of the buffer.
[i]…US,SS
■
Flag operations
Name Description
SR7
SR8
(ER)
To be set in the case of out-of-range in indirect access (index modification).
To be set when [D] (buffer size) is larger than 4096, or [D] (buffer size) is 0.
To be set when [D] +1 (stored data amount) is greater than or equal to [D] (buffer size).
To be set when [D] +3 (write pointer) is greater than or equal to [D] (buffer size).
To be set when the buffer area exceeds the upper limit of a specified device.
8.19 BUFW (Data Write)
WUME-FP7CPUPGR-12 8-41