參數(shù)資料
型號： KS8695X-EVAL
廠商： Micrel Inc
文件頁數(shù)： 8/39頁
文件大?。?/td> 0K
描述： BOARD EVAL EXPERIMENT KS8695X
標準包裝： 1
相關產品： KS8695X-ND - IC SWITCH 10/100 5PORT 208PQFP
其它名稱： 576-1005
KS8695X
Micrel
M9999-102604
16
October 2004
Signal Description
System Level Hardware Interfaces
Clock and Reset
JTAG
WAN Ethernet
PHY
LAN Ethernet
PHY
Advanced
Memory
Interface
GPIO
UART
PHY LED
Drivers
Factory Test
Power and
Ground
KS8695X
Figure 2. System Level Interfaces
At the system level the KS8695X features the following interfaces:
Clock interface for crystal or external oscillator
JTAG development interface
One WAN Ethernet physical interface
Four LAN Ethernet physical interfaces
PHY LED drivers
One high-speed UART interface
Eight GPIO pins
Advanced memory interface
– Programmable synchronous bus rate
– Programmable asynchronous interface timing
– Independently programmable data bus width for static and synchronous memory
– Glueless connection to SDRAM
– Glueless connection to flash memory or ROM
Factory test
Power and ground
Configuration Pins
Configuration
Pin Name
Pin #
Settings
Bank0 Flash Data Width
B0SIZE[1:0]
118,119
‘00’= reserved
‘01’ = byte wide
‘10’ = half word wide (16 bits)
‘11’ = word wide (32 bits)
WRSTO Polarity
EROEN/WRSTPLS
85
‘0’ = active high
‘1’ = active low
CPU Clock Select
URTSN/CPUCLKSEL
96
‘0’ = normal mode (PLL)
'1’ = bypass internal PLL
Table 1. Configuration Pins
Reset
The KS8695X has a single reset input that can be driven by a system reset circuit or a simple power on reset circuit. The
KS8695X also features a reset output (WRSTO) that can be used to reset other devices in the system. WRSTO can be
configured as either an active high reset or an active low reset through a strap-in option on pin 85 as shown in Table 1. The
KS8695X also has a built in watchdog timer. Once the user programs the watchdog timer and the timer setting expires, the
KS8695X will reset itself and also assert WRSTO to reset the other devices in the system. Figure 3 shows a typical system
that uses the KS8695X WRSTO as the system reset.
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