7
4891CS–GPS–01/06
ATR0622 [Preliminary]
3.2 Signal Description
Table 3-2. ATR0622 Signal Description
Module Name Function Type Active Level Comment
EBI BOOT_MODE Boot Mode Input Input –
PIO-controlled after reset,
internal pull-down resistor
USART
TXD1 to TXD2 Transmit Data Output Output – PIO-controlled after reset
RXD1 to RXD2 Receive Data Input Input – PIO-controlled after reset
SCK1 to SCK2 External Synchronous Serial Clock I/O – PIO-controlled after reset
USB
USB_DP USB Data (D+) I/O –
USB_DM USB Data (D-) I/O –
APMC RF_ON Output – Interface to ATR0601
AIC EXTINT0-1 External Interrupt Request Input
High/
Low/
Edge
PIO-controlled after reset
AGC AGCOUT0-1 Automatic Gain Control Output –
Interface to ATR0601
PIO-controlled after reset
RTC
NSLEEP Sleep Output Output Low Interface to ATR0601
NSHDN Shutdown Output Output Low Connect to pin LDO_EN
XT_IN Oscillator Input Input – RTC oscillator
XT_OUT Oscillator Output Output – RTC oscillator
SPI
SCK SPI Clock I/O – PIO-controlled after reset
MOSI Master Out Slave In I/O – PIO-controlled after reset
MISO Master In Slave Out I/O – PIO-controlled after reset
NSS/NPCS0 Slave Select I/O Low PIO-controlled after reset
NPCS1 to NPCS3 Slave Select Output Low PIO-controlled after reset
WD NWD_OVF Watchdog Timer Overflow Output – PIO-controlled after reset
PIO P0 to P31 Programmable I/O Port I/O – Input after reset
GPS
SIGHI0 Digital IF Input – Interface to ATR0601
SIGLO0 Digital IF Input – Interface to ATR0601
SIGHI1 Digital IF Input – PIO-controlled after reset
SIGLO1 Digital IF Input – PIO-controlled after reset
TIMEPULSE GPS synchronized time pulse Output – PIO-controlled after reset
CONFIG
GPSMODE0-12 GPS Mode Input – PIO-controlled after reset
STATUSLED Status LED Output – PIO-controlled after reset
NEEPROM Enable EEPROM Support Input Low PIO-controlled after reset
ANTON Active antenna power on Output Output – PIO-controlled after reset
NANTSHORT
Active antenna short circuit
detection Input
Input Low PIO-controlled after reset
NAADET0-1 Active antenna detection Input Input Low PIO-controlled after reset
Note: 1. The USB transceiver is disabled if VDD_USB < 2.0V. In this case the pins USB_DM and USB_DP are connected to GND
(internal pull-down resistors). The USB transceiver is enabled if VDD_USB is within 3.0V and 3.6V.
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