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1745D–ATARM–04-Nov-05
AT91M55800A
DAC
DA0 - DA1 Analog output channels 0 - 1 Analog out –
DAVREF Analog reference Analog ref –
Clock
XIN Main oscillator input Input –
XOUT Main oscillator output Output –
PLLRC RC filter for PLL Input –
XIN32 32 kHz oscillator input Input –
XOUT32 32 kHz oscillator output Output –
MCKO System clock Output –
APMC
WAKEUP Wakeup request Input –
SHDN Shutdown request Output – Tri-state after backup reset
Reset
NRST Hardware reset input Input Low Schmidt trigger
NRSTBU
Hardware reset input for battery
part
Input Low Schmidt trigger
NTRI Tri-state mode select Input Low Sampled during reset
JTAG/ICE
JTAGSEL
Selects between ICE and JTAG
mode
Input –
TMS Test mode select Input – Schmidt trigger, internal pull-up
TDI Test data input Input – Schmidt trigger, internal pull-up
TDO Test data output Output –
TCK Test clock Input – Schmidt trigger, internal pull-up
NTRST Test reset input Input Low Schmidt trigger, internal pull-up
Power
VDDA Analog power Analog pwr –
GNDA Analog ground Analog gnd –
VDDBU Power backup Power –
GNDBU Ground backup Ground –
VDDCORE Digital core power Power –
VDDIO Digital I/O power Power –
VDDPLL Main oscillator and PLL power Power –
GND Digital ground Ground –
GNDPLL PLL ground Ground –
Table 3-1. Pin Description (Continued)
Module Name Function Type
Active
Level Comments