參數(shù)資料
型號： SP37E760-MD
廠商： STANDARD MICROSYSTEMS CORP
元件分類： 外設(shè)及接口
英文描述： 3.3 V I/O CONTROLLER FOR EMBEDDED APPLICATIONS
中文描述： MULTIFUNCTION PERIPHERAL, PQFP100
封裝： TQFP-100
文件頁數(shù)： 12/78頁
文件大小： 510K
代理商： SP37E760-MD
Note 1:
SMSC DS – SP37E760
Page 12
Rev. 04/13/2001
nRI and the UART interrupts are active when PWRGD is active and the UARTS are either fully powered or in
AUTOPOWER DOWN mode.
Active (push-pull) output drivers are required on these pins in the enhanced parallel port modes.
An external pull-up must be provided for IOCHRDY.
The pull-down on this pin is always active including when the output driver is tristated and regardless of the
state of PWRGD.
Note 2:
Note 3:
Note 4:
2.2 Buffer Type Summary
Table 2 below describes the buffer types shown in Table 1. All values are specified at V
cc
= +3.3v,
±
10%
Table 2 - SP37E760 3.3V Buffer Type Summary
BUFFER
TYPE
IO12
Input/Output. 12mA sink; 6mA source
O12
Output. 12mA sink; 6mA source
O12PD
Output. 12mA sink; 6mA source with 30μa pull-down
OD12
Open Drain. 12mA sink
O6
Output. 6mA sink; 3mA source
OD14
Open Drain. 14mA sink
OP14
Output. 14mA sink; 14mA source. Backdrive Protected
IOP14
Input/Output. 14mA sink; 14mA source. Backdrive Protected
O4
Output. 4mA sink; 2mA source
ICLK
Input to Crystal Oscillator Circuit (TTL levels)
I
Input TTL Compatible
IS
Input with Schmitt Trigger
DESCRIPTION
2.3 Output Drivers
Active output drivers in the SP37E760 will always achieve the minimum specified DC Electrical Characteristics shown
in Table 54. Note: If there is a pull-up on an external node driven by an active output driver the SP37E760 will sink
current from the pull-up through the low impedance source.
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