Honeywell N568X, Руководство по интеграции

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Host Interface Signal Descriptions
Note: Do not connect unused pins to GND.
1.Signal can be driven internally to a logic low level by software configuration.
2.Signal polarity is selectable using pin 1 or via software configuration.
3.Signal operation is determined by software configuration.
4.For N56XXX-XXX-XX5 (USB Hi-Speed): 100k ohm pull-up resistor populated in this configuration.
5.For N56XXX-XXX-XX2 (RS232): 100k ohm pull-up resistor populated in this configuration.
TTL Level 232 Interface
Pin Signal I/O Description
1
232 Inv
1 Input TTL level 232 polarity control with 68k ohm pull-up. Connect to ground for
UART to UART serial signal polarity and override internal polarity control.
This signal can also be driven to a logic low level internally and tying or pulling
this input to Vcc is not recommended.
2 Vin Power Supply voltage input. Refer to specified input values on page 3-1.
3 GND Power Supply and signal ground.
4
(n)RXD
2,4 Input TTL level 232 receive data (default) and not receive data. (Polarity is menu
selectable.)
5
(n)TxD
2 Output TTL level 232 transmit data (default) and not transmit data. (Polarity is menu
selectable.)
6
(n)CTS
2,3,4,5 Input TTL level 232 Clear to Send signal (default) and not Clear to Send. (Polarity
is menu selectable.)
7
(n)RTS
2 Output TTL level 232 Request to Send (default) and not Request to Send. (Polarity is
menu selectable.)
8 PWRDWN/
nFLASH_OUT Output Open drain, 100K pull up on engine; PWRDWN (active high) indication that
the N56XX is in power off mode. nFLASH_OUT (active low) notification when
the unit is exposing. (Operation is menu selectable.)
9 nBEEPER Output Open drain, 100K pull up on engine; idle high signal that can be an active low
DC or PWM controlled AC signal used to drive an external beeper.
10 nGoodRead Output Open drain, 100K pull up on engine; active low signal for driving a low current
Good Read LED circuit.
11 nWAKE Input 100K pull up on engine; when in power off mode active low wake up signal to
the N56XX.
12 nTrig Input/
Output Open drain, weak pull up on engine; Trigger line is an active low signal to
trigger the unit. Leave the signal floating for inactive state and connected to
ground for active state.