Hardware

Bill Detweiler, over at TechReports reported in  his 2011 teardown  of the Simple Touch:

• CPU:  TI OMAP3621 (800MHz  ARM Cortex-A8) 
• Memory:  Samsung K4X2G323PC-8GD8 256MB DDR S-DRAM
• Display:   E Ink Pearl  (6 inch diagonal, 800x600 Resolution, 16 Levels of Grey)
  
  E Ink Pearl
  E Ink Pearl
• Touch Technology:   Neonode zForce Optical Touchscreen 
  
  (It is interesting to note that B&N chose not to use eInk's capacitative touch option, and instead went for the zForce optical option.  It makes me go "hmmm...?")
• Storage:   SanDisk SDIN5D2-2G NAND Flash chip
• Battery:  Model MLP305787 (3.7 V, 1530 mAh, Li-Ion)
• Wi-Fi:   Jorjin Technologies WG7310-2A  802.11 b/g/n
• Power Management IC for Display:   TI TPS65181 
• Multipurpose IC (Power Management, USB, Analog-to-Digital Converter, Realtime Clock, keypad interface, Embedded Power Control, and General Purpose Inputs/Outputs muxed with  JTAG  functions):   TI TPS65921B 


(The "keypad interface" makes me wonder if this is what is handling i/o from the five keys on the front of the nook...)
• (Best Guess??) Boot PROM OR Graphics Chip:   Lattice Semiconductor ispMACH 4032ZE  Complex Programmable Logic Device (CPLD)


( This document  from the Lattice Support page, makes me think this is serving the functon of a Boot PROM. The absence of any graphics chip makes me wonder if this has been programmed to do that.  I missed earlier that 2D & 3D graphics are built in to the TI OMAP3621.)

 
• Signal Switch::   TI CD74HC4067  High Speed CMOS 16-Channel Analog Multiplexer/Demultiplexer
• (Best Guess??) Touchscreen I/O:   TI MSP430F2272  16-bit Ultra-Low-Power Microcontroller

Bill Detweiler, over at TechReports reported in  his May 17, 2012 teardown  of the Simple Touch with Glow:


All of the above were identical with the following exceptions:

• Storage: Samsung KLM2G1HE3F-B001 2GB eMMC NAND flash chip

In the Glow review, Bill mentions several chips that are not mentioned in his Simple Touch w/o Glow review.  It is unclear whether these were simply not mentioned in the older review, or whether these were added to the Glow.  Looking for volunteers to clarify this!

• USB Li-Ion Battery Charger and Power-Path Management IC:   TI BQ24072  (Not sure exactly which version.  Chip Markings:  CKP TI A3T9)


(Thanks to  Renata NST  over at XDA for helping me hone in on that one!)
• Battery Charge & Health Monitor:   TI BQ27520  (not sure if it is G1, G2, G3 or G4...)
• Operational Amplifier:   TI TLV2624  (Not sure exactly which version.  Chip Markings:  TI 2624I)
• 4-Bit Bidirectional Voltage-Level Translator:   TI TXB0104  (Not sure exactly which version.  Chip Markings:  YE04 18K G4 A919)

Hardware Buttons:

(Best Guess??) is the TI TPS65921B Mulitpurpose IC is handling I/O from these.