Microchip Technology SA5 Series, User Manual

Page: 57 / 63

TABLE D-2: CONNECTIONS
Eval
Board ID
Label Function
Maps to MAC
Pin
J7 Analog Tune
(INPUT) Accepts DC voltage for frequency
steering
1
J5 PPS_in_0
(INPUT) Accepts a 1PPS (3.3V, 50 Ω ) signal
for Freq/Phase Disciplining
J1-5,7
J6 PPS_in_1
(INPUT) Accepts a 1PPS (3.3V, 50 Ω ) signal
for Freq/Phase Disciplining
J1-1,3
J2 10 MHz
(OUTPUT) Buffered MAC RF output (3.3V,
50
Ω )
3
J3 BITE/Lock (OUTPUT) MAC Lock status (CMOS, 1 M Ω ) 6
J4 PPS_out
(OUTPUT) Buffered MAC 1PPS output sig-
nal (3.3V, LVCMOS, 50
Ω )
J1-17,19
J1 RS-232
(COMM.) access the MAC’s serial communi-
cation port
7, 8
J8 USB-micro
(COMM.) access the MAC’s high-speed USB
communication port
J1-2,4,6
PS1 5VDC Power
(POWER) accepts the 5VDC wall-mount
power adapter for powering the Evaluation
board and the MAC
5
J10 Wide Voltage Input
(POWER) accepts an alternate source of
voltage for the MAC (only) if J11 jumpers are
removed
5
SW1 Toggle Switch
(SWITCH) allows power to flow to the Evalu-
ation board from the 5VDC supply
N/A
DS3 Power Status
(LED) illuminates when power is provided to
PS1
N/A
DS1 Alarm Status
(LED) illuminates when an alarm condition is
triggered
J1-20
DS2 Lock Status
(LED) illuminates when Atomic Lock is
achieved
6
Evaluation Kit

2019 Microchip Technology Inc. DS50002938A-page 57
D.2.1 Communications Connections
The Evaluation board has two USB connections for communicating between a PC and
a MAC-SA5X (blue arrows in Figure
D-2). The “RS-232” connection accepts a
USB-mini(M) connector that then passes to a serial converter on the Evaluation board
and applies the appropriate levels on pins 7,8 of the MAC. A USB 2.0-to-USB-mini
cable is provided in the kit.
The “USB-micro” connection accepts a USB-micro(M) connector that maps to pins
J1-2,4 of the MAC. A cable is not provided in the kit.
Consult the main portion of the MAC-SA5X User Guide for advice on communicating
with a MAC plugged in to the Evaluation board.
Three LEDs communicate status information to the user by illuminating under the fol-
lowing conditions:
• Power Status LED illuminates when power is provided to PS1.
• Alarm Status LED illuminates when an alarm condition is triggered.
• Lock Status LED illuminates when Atomic Lock is achieved.