HT68F14 HOLTEK [Holtek Semiconductor Inc], HT68F14 Datasheet - Page 65

• Manufacturer Part Number: HT68F14
• Description: Enhanced I/O Flash Type MCU
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Compact Type TM - CTM
Rev. 1.10
Compact TM Operation
The following steps show the read and write procedures:
Although the simplest form of the three TM types, the Compact TM type still contains three operating
modes, which are Compare Match Output, Timer/Event Counter and PWM Output modes. The
Compact TM can also be controlled with an external input pin and can drive one or two external output
pins. These two external output pins can be the same signal or the inverse signal.
At its core is a 10-bit count-up counter which is driven by a user selectable internal or external clock
source. There are also two internal comparators with the names, Comparator A and Comparator P.
These comparators will compare the value in the counter with CCRP and CCRA registers. The CCRP
is three bits wide whose value is compared with the highest three bits in the counter while the CCRA is
the ten bits and therefore compares with all counter bits.
Writing Data to CCRB or CCRA
Reading Data from the Counter Registers and CCRB or CCRA
HT68F14, HT68F15
Step 1. Write data to Low Byte TMxAL or TMxBL note that here data is only written to the 8-bit
buffer.
Step 2. Write data to High Byte TMxAH or TMxBH here data is written directly to the high byte
registers and simultaneously data is latched from the 8-bit buffer to the Low Byte registers.
Step 1. Read data from the High Byte TMxDH, TMxAH or TMxBH here data is read directly
from the High Byte registers and simultaneously data is latched from the Low Byte register into
the 8-bit buffer.
Step 2. Read data from the Low Byte TMxDL, TMxAL or TMxBL this step reads data from the
8-bit buffer.
HT68F13
CTM
Compact Type TM Block Diagram
10-bit CTM
Name
65
Enhanced I/O Flash Type MCU
TM No.
0
HT68F13/HT68F14/HT68F15
TM Input Pin
TCK0
TM Output Pin
TP0_0, TP0_1
February 9, 2011