HT48R065G View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT48R065G' PDF : 126 Pages View PDF
HT48R064G/065G/066G/0662G
Enhanced I/O Type 8-Bit OTP MCU with OPA
Timer/Event 0/1 Counter Interrupt Vector
This internal vector is used by the Timer/Event Counters. If a Timer/Event Counter overflow occurs,
the program will jump to its respective location and begin execution if the associated Timer/Event
Counter interrupt is enabled and the stack is not full.
Time Base Interrupt Vector
This vector is used by the OPA0, OPA1 and Comparator. When either an OPA or Comparator,
dependent upon which one is selected, requires interrupt servicing, the program will jump to this
location and begin execution if the output interrupt is enabled and the stack is not full.
Look-up Table
Any location within the Program Memory can be defined as a look-up table where programmers can
store fixed data. To use the look-up table, the table pointer must first be setup by placing the lower
order address of the look up data to be retrieved in the table pointer register, TBLP. This register
defines the lower 8-bit address of the look-up table.
After setting up the table pointer, the table data can be retrieved from the current Program Memory
page or last Program Memory page using the ²TABRDC[m]² or ²TABRDL [m]² instructions,
respectively. When these instructions are executed, the lower order table byte from the Program
Memory will be transferred to the user defined Data Memory register [m] as specified in the
instruction. The higher order table data byte from the Program Memory will be transferred to the
TBLH special register. Any unused bits in this transferred higher order byte will be read as ²0².
The following diagram illustrates the addressing/data flow of the look-up table:
Lastpage or
p re s e n t p a g e
P C x~P C 8
P C H ig h B y te
T B L P R e g is te r
P ro g ra m M e m o ry
D a ta
1 4 ~ 1 5 b its
R e g is te r T B L H
H ig h B y te
U s e r S e le c te d
R e g is te r
L o w B y te
Table Location Bits
Instruction
b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
TABRDC [m] PC11 PC10 PC9 PC8 @7 @6 @5 @4 @3 @2 @1 @0
TABRDL [m]
1
1
1
1 @7 @6 @5 @4 @3 @2 @1 @0
Table Location
Note:
PC11~PC8: Current Program Counter bits
@7~@0: Table Pointer TBLP bits
For the HT48R064G, the Table address location is 10 bits, i.e. from b9~b0
For the HT48R065G, the Table address location is 11 bits, i.e. from b10~b0
For the HT48R066G/HT48R0662G, the Table address location is 12 bits, i.e. from b11~b0
Rev. 1.10
27
October 23, 2012
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