UR8HC007-001 Datasheet, PDF (5/18 Pages) Semtech Corporation – Input Device and Power Management Companion IC for Jupiter Devices

PIN DEFINITIONS (CON’T)
Mnemonic
_HSUS
Pin Numbers
QFP
Type
26
I
Communication
interface
_SS/_RTS
60
I_Int
_ATN/_CTS
18
O
MISO/TXD
MOSI/RXD
SCLK/ISEL
20
I/O / O
21
I
19
I
Note 1: An underscore in front of the pin
mnemonic denotes an active low signal.
Name and Function
Host_Suspended signal
(Active-Low). When Low, indicates
that Host Computer System is in
Power-reduced or Stop mode.
Slave_Select (SPI Mode) or
Ready_To_Send (Asynchronous
Serial Mode). Active-Low signal Input.
Low-level indicates that the Host
System has data for the UR8HC007-
001 peripheral device or the Host
System is ready to accept data from
the UR8HC007-001 peripheral device.
Capable of Interrupt on Negative edge.
Pin 60 and pin 18 should both be "Low"
for data exchange to occur.
Attention (SPI Mode) or
Clear_To_Send (Asynchronous
Serial Mode ). Active-Low signal
Output. Low-level indicates that the
UR8HC007-001 peripheral device has
data for the Host System or the
UR8HC007 peripheral device is ready
to accept data from the Host System.
Pin 18 and pin 60 should both be "Low"
for data exchange to occur.
Master-In-Slave-Out (SPI Mode) or
Transmit Data (Asynchronous Serial
Mode, Idle = "High" = 1)
Master-Out-Slave-In (SPI Mode) or
Receive Data (Asynchronous
Serial Mode)
Serial Clock (SPI Mode) or Interface
Select (Asynchronous Serial Mode).
Tie "Low" to select Asynchronous
Serial Mode. In SPI Mode, use the
following Clock sequence: Idle-High /
Negative-Edge (Shift Data) \ Positive-
Edge (Latch Data), Idle-High.
Copyright ©1998-2001 Semtech Corporation
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DOC8-007-001-DS-108
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