SPEAR300-2 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
SPEAR300-2
STMicroelectronics
'SPEAR300-2' PDF : 83 Pages View PDF
SPEAr300
3
Pin description
Pin description
3.1
3.2
The following tables describe the pinout of the SPEAr300 listed by functional block.
List of abbreviations:
PU = Pull Up
PD = Pull Down
Required external components
1. DDR_COMP_1V8: place an external 121 kresistor between ball P4 and ball R4
2. USB_TX_RTUNE: connect an external 43.2 k pull-down resistor to ball K5
3. DIGITAL_REXT: place an external 121 k resistor between ball G4 and ball F4.
Dedicated pins
Table 2. Master clock, RTC, Reset and 3.3 V comparator pin descriptions
Group
Signal name
Ball
Direction
Function
Pin type
Master Clock
RTC
MCLK_XI
MCLK_XO
RTC_XI
RTC_XO
P1
Input
24 MHz (typical)
crystal in
Oscillator 2.5 V
24 MHz (typical)
capable
P2
Output
crystal out
E2
Input
32 kHz crystal in Oscillator 1.5 V
E1
Output 32 kHz crystal out
capable
Reset
MRESET#
M17
Input
Main Reset
TTL Schmitt
trigger input
buffer, 3.3 V
tolerant, PU
DIGITAL_REXT
G4
3.3 V Comp.
DIGITAL_GND_R
EX
F4
Output
Power
Configuration
Power
Analog, 3.3 V
capable
Power
Table 3. Power supply pin description
Group
Signal name
Ball
DIGITAL
GROUND
ANALOG
GROUND
I/O
GND
AGND
VDD3
G6, G7, G8, G9, G10, G11, H6, H7, H8, H9, H10,
H11, J6, J7, J8, J9, J10, J11, K6, K7, K8, K9, K10,
K11, L6, L7, L8, L9, L10, M8, M9, M10
F2, G1, J2, L1, L3, L5, N2, N4, P3, R3,N12
F5, F6, F7, F10, F11, F12, G5, J12, K12, L12, M12
Value
0V
0V
3.3 V
Doc ID 16324 Rev 2
29/83
Share Link: 