Block Diagram; St�Uctu; 4-Pin Sop (�00�Il) Outline Di�Ensions - Holtek HT66F20-1 Manual

HT66F20-1/HT66F30-1/HT68F20-1/HT68F30-1
Flash MCU with EEPROM

Block Diagram

F l a s h / E E P R O M
P r o g r a m m i n g
C i r c u i t r y ( I S P )
F l a s h E E P R O M
P r o g r a m D a t a
M e m o r y M e m o r y
I / O S I M
Note: Only the HT66F30-1 and HT66F20-1 devices have A/D function.
Rev. 1.40
L o w
V o l t a g e
D e t e c t
L o w
V o l t a g e
R e s e t
S t a c k
R A M
T B 0 / T B 1 D a t a
M e m o r y
T M 0 T M 1
9
W a t c h d o g
T i m e r
R e s e t
C i r c u i t
8 - b i t
I n t e r r u p t
R I S C
C o n t r o l l e r
M C U
C o r e
E R C / H X T
O s c i l l a t o r
H I R C L I R C / L X T
O s c i l l a t o r O s c i l l a t o r
1 2 - B i t A / D
C o n v e r t e r
C o m p a r a t o r s
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