All chip parts / designators from a C/NTR-CPU-01 board

Chips U1-U12

Designation: U1
Silkscreen: NTR-CPU
Package: Evil BGA package
Purpose: Main CPU / Sub CPU / 2D cores / 3D core / Various memories / BIOSes
Chip Text:

 
0437 4m
CPU NTR
(M)(C)2004
Nintendo
Japan ARM

Designation: U2
Silkscreen: NTR-SRAM
Package: BGA 48
Purpose: 2M x 16 PSRAM
Chip Text:

 
ST M69AB048
BL70ZA8
AA2AS  9
FWN 99 437

Designation: U3
Silkscreen: ?
Package: 64 pin QFP (T?)
Purpose: Power management
Chip Text:

 
MITSUMI
   JAPAN
     438
   3152A

Designation: U4
Silkscreen: RTC
Package: Insanely small 8 pin
Purpose: Real Time Clock
Chip Text:

 
110
408
458
 

Designation: U5
Silkscreen: NTR-RFU
Package: Custom shielded (approx. 32 pins)
Purpose: 802.11b Radio modem

Designation: U6
Package: 16 pin SOIC
Purpose: Low Voltage I/O Touch Screen Controller
Chip Text:

 
TI TSC
2046I
48MXNK5

or for EUR version:

 
AKM
4148AVT
ON439

Designation: U7 Package: 6 pin (5 actually, missing middle left pin)
Location: Unknown
Purpose: Unknown
Chip Text:

Designation: U8
Package: 6 pin (5 actually, missing middle left pin)
Location: Left edge of back
Purpose: Unknown
Chip Text:

 
KEG

Designation: U9
Package: 6 pin (5 actually, missing middle left pin)
Location: Left edge of back
Purpose: Unknown
Chip Text:

 
KER

Designation: U10
Package: 6 pin (5 actually, missing middle left pin)
Location: Left edge of back
Purpose: Unknown
Chip Text:

 
KER

Designation: U11
Package: 6 pin (3 actually, missing two on one side, and one on the other)
Location: Above ABXY button cluster
Purpose: Magnetic sensor
Chip Text:

 
W672
45KL

Designation: U12
Package: 8 pin SOIC narrow
Location: Below ABXY button cluster
Purpose: Dual 250 mW Audio Power Amplifier with Shutdown Mode
Chip Text:

 
45RF (maybe, can't read this line well)
LM
4880M

Connectors

Designation: P1
Purpose: GBA cartridge slot

Designation: P2
Purpose: DS card slot

Crystal (oscillator)

Designation: X1
Value: 16.756 MHz
Purpose: Main time base
Chip Text: D164J

Designation: X2
Value: 32.768 KHz
Purpose: RTC time base
Chip Text:

 
32.768
KDS0438

RFU

Package: 48 pin
Purpose:
Chip Text:

 
MITSUMI
  JAPAN
    437
 MM3155

Package: 8 pin
Purpose: Firmware EEPROM
Chip Text:

 
25FW203T
   4KU20

(first 256 pages of 256 bytes can be protected) or

 
ST
45PE20P
  94400

(first 512 bytes can be protected)

PCB (inferred) Nomenclature:

• SL = Short Line (normally open, short for special behavior)
  • SL1 = Short to disable write protection on Firmware
• CL = Cut Line (normally closed, cut for special behavior)
• VDDx = Voltage x
  • VDD5, VDD3.3, VDD1.5, VDD1.8, VDD-10, VDD-5, VDD15, VDD10
• Pxx = Pin? xx (goes to keys register, i.e. P00 is bit 0)
  • P00, P01, P02, P03, P04, P05, P06, P07, P08, P09
• Rxx = Retarded? xx (goes to arm7 R reg, e.g. X/Y/penirq)
  • R00, R01, ?
• LDR0..LDR5, LDG0..LDG5, LDB0..LDB5 - RGB lcd data, dunno which is MSB
• BT+ / BT-: battery terminals
• PWSW - power switch
• AD0..AD15, A16..A23 - GBA cart address bus
• PHI - GBA cart configurable clock terminal
• IRQ - GBA cart irq line
• CLKB-MC - DS card ROM CLK
• CSB-MC - DS card ROM /CS line
• RESB-MC - DS card reset line
• CSB-MC2 - DS card SPI /CS line
• IREQ-MC - DS card irq line
• I/O0..I/07 - DS card data bus (SPI data bus shared here)
• RST -
• lots more

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