VR4102 datasheet(685/701 Pages) NEC

685 / 701 page

685

APPENDIX A DIFFERENCES BETWEEN VR4102 AND VR4101

A.1 SUMMARY OF DIFFERENCES

Item

VR4102

VR4101

Cache size

Instruction: 4 Kbytes, data: 1 Kbyte

Instruction: 2 Kbytes, data: 1 Kbyte

ISA

Bus sizing

16-/8-bit dynamic bus sizing

Select 16-/8-bit bus with address spaces

interface

Bus hold

Available

Not available

I/O space

64 Mbytes

4 Mbytes

Memory space

64 Mbytes

4 Mbytes

LCD memory space

Switches between LCD mode and high-speed

memory mode

Supports only LCD mode

Max.

DRAM

capacity

(EDO type)

32 Mbytes

8 Mbytes

Max. ROM capacity

32 Mbytes

16 Mbytes

DRAM type

16 Mbits, 64 Mbits

16 Mbits

Memory

controller

ROM type

32 Mbits, 64 Mbits

16 Mbits, 32 Mbits

Power-on factor

4 factors

3 factors

DMA controller

Connected to AIU and FIR

Uses a DMA space for each page

Connected to AIU, PIU, KIU, and SIU

Uses a DMA space linearly

Timer, counter

4 channels:

24 bits x 2 (32.768 kHz)

48 bits x 1 (32.768 kHz)

25 bits x 1 (for performance test, TClock)

3 channels:

24 bits x 1 (32.768 kHz)

48 bits x 1 (32.768 kHz)

31 bits x 1 (for performance test, TClock)

Keyboard interface

Supports 64/80/96 keys

Supports up to 64 keys

Audio interface

Supports PCM input/output

On-chip D/A converter

Supports PWM/Buzz output

Touch panel interface

On-chip 10-bit A/D converter

On-chip touch panel controller

External 10/12-bit A/D converter

External touch panel controller

Serial interface

NS16650 compatible x 1

(Max. data rate: 1.152 Mbps)

NEC original x 1

(Max. data rate: 115.2 kbps Max.)

NEC original x 2

(Max. data rate: 115.2 kbps)

Ports for LED lighting

Available

Not available

MODEM interface

On-chip interface supporting software MODEM

(equivalent to PCT288I)

Not available

IrDA interface

FIR (Max. data rate: 4 Mbps)

SIR (Max. data rate: 115.2 kbps)

General-purpose I/O ports

49 Max. (including alternate-function pins)

12 Max.

Clock input

32.768 kHz (input to CG),

18.432 MHz (input to CG),

48 MHz (directly connected to on-chip IrDA

interface)

32.768 kHz (input to CG)

Package

216 pin LQFP, 224-pin FBGA

160 pin LQFP

VR4102 Datasheet(PDF) 685 Page - NEC

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