Datasheet
Section 1 Overview 
Rev.5.00 Nov. 02, 2005 Page 2 of 500 
REJ09B0027-0500   
•  On-chip memory 
Model 
Product Classification 
Standard 
Version 
On-Chip Power-
On Reset and 
Low-Voltage 
Detecting Circuit 
Version ROM RAM Remarks 
H8/3687F  HD64F3687  HD64F3687G  56 kbytes  4 kbytes   Flash memory version 
(F-ZTAT
TM
 version) 
H8/3684F  HD64F3684  HD64F3684G  32 kbytes  4 kbytes   
H8/3687  HD6433687  HD6433687G  56 kbytes  3 kbytes   Mask-ROM version 
H8/3686  HD6433686  HD6433686G  48 kbytes  3 kbytes   
  H8/3685  HD6433685  HD6433685G  40 kbytes  3 kbytes   
  H8/3684  HD6433684  HD6433684G  32 kbytes  3 kbytes   
  H8/3683  HD6433683  HD6433683G  24 kbytes  3 kbytes   
  H8/3682  HD6433682  HD6433682G  16 kbytes  3 kbytes   
Flash 
memory 
version 
H8/3687N    HD64N3687G  56 kbytes  4 kbytes   
EEPROM 
stacked 
version 
(512 bytes) 
Mask-ROM 
version 
    HD6483687G  56 kbytes  3 kbytes   
•  General I/O ports 
  I/O pins: 45 I/O pins (43 I/O pins for H8/3687N), including 8 large current ports (I
OL
 = 20 
mA, @V
OL
 = 1.5 V) 
  Input-only pins: 8 input pins (also used for analog input) 
•  EEPROM interface (only for H8/3687N) 
  I
2
C bus interface (conforms to the I
2
C bus interface format that is advocated by Philips 
Electronics) 
•  Supports various power-down states 
Note: F-ZTAT
TM
 is a trademark of Renesas Technology Corp. 
•  Compact package 
Package  Code  Body Size  Pin Pitch 
LQFP-64 FP-64E  10.0 × 10.0 mm  0.5 mm 
QFP-64 FP-64A  14.0 × 14.0 mm  0.8 mm 
Only LQFP-64 (FP-64E) for H8/3687N package 










