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HT95C30P Datasheet(PDF) 9 Page - Holtek Semiconductor Inc |
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HT95C30P Datasheet(HTML) 9 Page - Holtek Semiconductor Inc |
9 / 42 page HT95L100/10P Rev. 0.10 9 October 1, 2002 Preliminary BP Address Function Description 00 11 TMR1C Timer/Event Counter 1 control register 00 12 PA Port A data register 00 13 PAC Port A control register 00 14 PB Port B data register 00 15 PBC Port B control register 00 16 DIALERIO Dialer I/O register 00 1A PE Port E data register (bit3~bit0) 00 1B PEC Port E control register (bit3~bit0) 00 1E INTC1 Interrupt control register 1 Embedded control register 00 20 DTMFC DTMF generator control register 00 21 DTMFD DTMF generator data register 00 22 LINE Line control register 00 24 RTCC Real time clock control register 00 26 MODE Operation mode control register 00 28 LCDIO LCD segment and I/O option register 00 2D LCDC LCD driver control register 00 2E PFDC PFD control register 00 2F PFDD PFD data register General purpose RAM 00 40~FF BANK0 RAM General purpose RAM space 01 40~FF BANK1 RAM General purpose RAM space 02 40~FF BANK2 RAM General purpose RAM space 03 40~FF BANK3 RAM General purpose RAM space 04 40~FF BANK4 RAM General purpose RAM space 05 40~FF BANK5 RAM General purpose RAM space LCD RAM display memory 1B 8C~9F LCD RAM LCD RAM mapping space for COM0~COM7 Indirect addressing register Location 00H and 02H are indirect addressing registers that are not physically implemented. Any read/write op- eration of [00H] and [02H] will access the memory pointed to by MP0 and MP1, respectively. Reading loca- tion [00H] or [02H] indirectly returns the result 00H, while writing it leads to no operation. MP0 is indirectly addressable in bank0, but MP1 is available for all banks by switch BP [04H]. If BP is unequal to 00H, the indirect addressing mode to read/write operation from 00H~3FH will return the result as same as the value of bank0. The memory pointer registers MP0 and MP1 are 8-bits registers, and the bank pointer register BP is 5-bits reg- ister. Accumulator The accumulator is closely related to ALU operations. It is also mapped to location 05H of the data memory and can operate with immediate data. All data movement between two data memory locations must pass through the accumulator. Arithmetic and logic unit - ALU This circuit performs 8-bit arithmetic and logic opera- tions and provides the following functions: · Arithmetic operations (ADD, ADC, SUB, SBC, DAA) · Logic operations (AND, OR, XOR, CPL) · Rotation (RL, RR, RLC, RRC) · Increment and Decrement (INC, DEC) |
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