TTP259-ASFN datasheet(34/81 Pages) TONTEK

34 / 81 page

Preliminary

TTP259

TonTouch

2015/05/25

Page 34 of 81

Ver: 1.1

TCP2H[206H]: TCP2 high nibble data register [R/W], default value [0000]

Bit3

Bit2

Bit1

Bit0

Bit Name TCP2_11/TCP2D11 TCP2_10/TCP2D10 TCP2_9/TCP2D9 TCP2_8/TCP2D8

Read/Write

R/W

TCP2_11~TCP2_8: Reading TCP2 counter high nibble data.

TCP2D11~TCP2D8: Writing TCP2D high nibble of data buffer.

* TCP2D: Like a 12-bit TCP2 data register [R/W], default value [000H]

TCP2D

Bit11

Bit10

Bit9

Bit8

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Bit Name TCP2D11 TCP2D10 TCP2D9 TCP2D8 TCP2D7 TCP2D6 TCP2D5 TCP2D4 TCP2D3 TCP2D2 TCP2D1 TCP2D0

The special R/W function for TCP2 has different Target, AS writing

TCP2H/M/L registers that are updating preload data of the TCP2D. As read

TCP2H/M/L registers that are the brand new TCP2 counter value.

.Timer

When TCPx works as a Timer, user needs give the preload data TCPxD for

periodic interrupt. After initial setting, user starts the TCPx counting by setting.

When 8-bit TCP1 timer/counter:

TCP1EN=1, the TCP1 cycle period is:

Tc = (selected clock cycle) * (256) if TCP1D=00H

Tc = (selected clock cycle) * (TCP1D) otherwise

When 12-bit TCP2 timer/counter:

TCP2EN=1, the TCP2 cycle period is:

Tc = (selected clock cycle) * (4096) if TCP2D=000H

Tc = (selected clock cycle) * (TCP2D) otherwise

When 20-bit timer/counter:

Tc = (selected clock cycle) * (1048576) if TCP1D=00H and TCP2D=000H

Tc = (selected clock cycle) * (TCP2D*256+TCP1D) otherwise

When user writes data to the TCPxH/M/L, the data just keep in TCPxH/M/L

latch. During the TCPxEN=1 command executed, the TCPxH/M/L latch’s

complement value will load into counter TCPxH/M/L as initial value and start the

timer function. Necessary TCPxLD=1, timer run with reload feature as TCPx up

counts and reaches the value of FFH or 255 for TCP1 or value of FFFH or 4095

TTP259-ASFN Datasheet(PDF) 34 Page - Tontek Design Technology

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