參數資料
型號: LAN9117-MT
廠商: STANDARD MICROSYSTEMS CORP
元件分類: 微控制器/微處理器
英文描述: HIGH PERFORMANCE SINGLE-CHIP 10/100 NON-PCI ETHERNET CONTROLLER
中文描述: 1 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100
封裝: ROHS COMPLIANT, TQFP-100
文件頁數: 119/131頁
文件大小: 1531K
代理商: LAN9117-MT
High Performance Single-Chip 10/100 Non-PCI Ethernet Controller
Datasheet
SMSC LAN9117
119
Revision 1.1 (05-17-05)
DATASHEET
Note:
A PIO Burst Read cycle begins when both nCS and nRD are asserted. The cycle ends when
either or both nCS and nRD are deasserted. They may be asserted and deasserted in any
order.
6.4
RX Data FIFO Direct PIO Reads
In this mode the upper address inputs are not decoded, and any read of the LAN9117 will read the
RX Data FIFO. This mode is enabled when FIFO_SEL is driven high during a read access. This is
normally accomplished by connecting the FIFO_SEL signal to high-order address line. This mode is
useful when the host processor must increment its address when accessing the LAN9117. Timing is
identical to a PIO read, and the FIFO_SEL signal has the same timing characteristics as the address
lines.
Note that address lines A[2:1] are still used, and address bits A[7:3] are ignored.
Note:
The “Data Bus” width is 16 bits
Table 6.4 PIO Burst Read Timing
SYMBOL
DESCRIPTION
MIN
TYP
MAX
UNITS
t
csh
nCS, nRD Deassertion Time
13
ns
t
csdv
nCS, nRD Valid to Data Valid
30
ns
t
acyc
Address Cycle Time
45
t
asu
Address Setup to nCS, nRD valid
0
ns
t
adv
Address Stable to Data Valid
40
t
ah
Address Hold Time
0
ns
t
don
Data Buffer Turn On Time
0
ns
t
doff
Data Buffer Turn Off Time
7
ns
t
doh
Data Output Hold Time
0
ns
Figure 6.3 RX Data FIFO Direct PIO Read Cycle Timing
Data Bus
nCS, nRD
FIFO_SEL
A[2:1]
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