HD64F3437TF16 Datasheet, PDF (34/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

1.2 Block Diagram
Figure 1.1 shows a block diagram of the H8/3437 Series.
PA₀/KEYIN₈
PA₁/KEYIN₉
PA₂/KEYIN₁₀
PA₃/KEYIN₁₁
PA₄/KEYIN₁₂
PA₅/KEYIN₁₃
PA₆/KEYIN₁₄
PA₇/KEYIN₁₅
P1₀/A₀
P1₁/A₁
P1₂/A₂
P1₃/A₃
P1₄/A₄
P1₅/A₅
P1₆/A₆
P1₇/A₇
P2₀/A₈
P2₁/A₉
P2₂/A₁₀
P2₃/A₁₁
P2₄/A₁₂
P2₅/A₁₃
P2₆/A₁₄
P2₇/A₁₅
KEYIN₀/P6₀/FTCI
KEYIN₁/P6₁/FTOA
KEYIN₂/P6₂/FTIA
KEYIN₃/P6₃/FTIB
KEYIN₄/P6₄/FTIC
KEYIN₅/P6₅/FTID
KEYIN₆/P6₆/FTOB/IRQ₆
KEYIN₇/P6₇/IRQ₇
CPU
H8/300
Data bus (low)
ROM
(flash memory,
PROM, or
RAM
mask ROM) ^{H8/3437: 2 kbytes}
H8/3437: 60 kbytes ^{H8/3436: 2 kbytes}
H8/3436: 48 kbytes ^{H8/3434: 1 kbyte}
H8/3434: 32 kbytes
Watchdog
timer
Host
interface
16-bit
free-running
timer
8-bit timer
(2 channels)
Serial
communication
interface (2 channels)
I²C bus interface
(1 channel) [option]
10-bit
A/D converter
(8 channels)
PWM timer
(2 channels)
8-bit
D/A converter
(2 channels)
Port 4
Port 7
Port 5
PB₀/XDB₀
PB₁/XDB₁
PB₂/XDB₂
PB₃/XDB₃
PB₄/XDB₄
PB₅/XDB₅
PB₆/XDB₆
PB₇/XDB₇
P9₀/ADTRG/ECS₂/IRQ₂
P9₁/IRQ₁/EIOW
P9₂/IRQ₀
P9₃/RD
P9₄/WR
P9₅/AS
P9₆/ø
P9₇/WAIT/SDA
P3₀/D₀/HDB₀
P3₁/D₁/HDB₁
P3₂/D₂/HDB₂
P3₃/D₃/HDB₃
P3₄/D₄/HDB₄
P3₅/D₅/HDB₅
P3₆/D₆/HDB₆
P3₇/D₇/HDB₇
P8₀/HA₀
P8₁/GA₂₀
P8₂/CS₁
P8₃/IOR
P8₄/TxD₁/IRQ₃/IOW
P8₅/RxD₁/IRQ₄/CS₂
P8₆/SCK₁/IRQ₅/SCL
Memory Sizes
ROM
RAM
H8/3437
60 kbytes
2 kbytes
H8/3436
48 kbytes
2 kbytes
H8/3434
32 kbytes
1 kbyte
Figure 1.1 Block Diagram
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