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參數(shù)資料
| 型號： | LH543620 |
| 廠商： | Sharp Corporation |
| 英文描述： | 1024 x 36 Synchronous FIFO |
| 中文描述： | 1024 × 36同步FIFO |
| 文件頁數(shù)： | 18/38頁 |
| 文件大小： | 269K |
| 代理商： | LH543620 |
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Control Register (See Figure 7)
After reset, the control register’s value is 1. This sets
the following conditions:
Odd parity
Disabling parity generation (parity check is active).
AF, HF, AE flags are asynchronous.
OE signal does not control the Read pointer.
Read/Write Resource Register Mode
It is possible to write to the resource registers from
either the Input Port or the Output Port. Reading from the
resource register is possible only from the Output Port.
The source port for the write operation is determined by
the control signal CAPR.
Input Port:
Data from the Input Port is written to a resource register
when:
the value of the input-address field, ADI, selects the
register (see Table 1)
CAPR is LOW
The operation is enabled by ADI[2:0] and synchronized
to CKI.
Output Port:
Data from the Output Port is written to a resource
register when:
the value of the output-address field, ADO, selects the
register (see Table 4)
CAPR is HIGH
OE is HIGH
NOTE:
ADI[2:0] should remain stable whenever data is
coming in from the output port.
Data is read from a resource register to the Output Port
when:
the value of the output-address field, ADO, selects the
register (see Table 4)
OE is LOW
Both operations are enabled by ADO[2:0] and are
synchronous to CKO.
MAILBOX
The mailbox mechanism includes:
One 36-bit data register.
Two status flags:
– MFF Mailbox Full Flag
– MEF Mailbox Empty Flag
543620-29
6
5 4
3
2 1
0
0 EVEN PARITY
1 ODD PARITY
0 PARITY GENERATION IS DISABLED
1 PARITY GENERATION IS ENABLED
0 AE ASYNCHRONOUS
1 AE SYNCHRONOUS TO CKO
0 HF ASYNCHRONOUS
1 HF SYNCHRONOUS TO CKO
2 OR 3 HF SYNCHRONOUS TO CKI
0 AF ASYNCHRONOUS
1 AF SYNCHRONOUS TO CKI
0 OE DOES NOT CONTROL THE READ POINTER
1 OE CONTROLS THE READ POINTER
Figure 7. LH543620 Control Register
LH543620
1024
×
36 Synchronous FIFO
18
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| LH543620M-20 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x36 Synchronous FIFO |
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| LH543620P-20 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x36 Synchronous FIFO |
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