TMP92CM22

2007-02-16

92CM22-255

7. Points to Note and Restrictions
(1) Notation
1. The notation for built-in I/O registers is as follows register symbol <Bit symbol>.
Example: TA01RUN<TA0RUN> denotes bit TA0RUN of register TA01RUN.
2. Read-modify-write instructions (RMW)

An instruction in that the CPU reads data from memory and writes the data to the

same memory location by using one instruction.

Example 1: SET 3, (TA01RUN) … Set bit3 of TA01RUN.
Example 2: INC 1, (100H) … Increment the data at 100H.
• Examples of read-modify-write instructions on the TLCS-900
Exchange instruction
EX (mem), R
Arithmetic operations
ADD (mem), R/# ADC (mem), R/#
SUB (mem), R/# SBC (mem), R/#
INC #3, (mem) DEC #3, (mem)
Logic operations
AND (mem), R/# OR (mem), R/#
XOR (mem), R/#

Bit manipulation operations
STCF #3/A, (mem) RES #3, (mem)
SET #3, (mem) CHG #3, (mem)
TSET #3, (mem)
Rotate and shift operations
RLC (mem) RRC (mem)
RL (mem) RR (mem)
SLA (mem) SRA (mem)
SLL (mem) SRL (mem)
RLD (mem) RRD (mem)
3. fOSCH, fc, fFPH, fSYS, and one state
The clock frequency that is inputted from X1 and X2 is called “fOSCH”. The clock that is
selected by PLLCR<FCSEL> register is called “fc”.
The clock that selected by SYSCR1<SYSCK> is called “fFPH”. The clock frequency that is
give by “fFPH” divided by 2 is called “fSYS”.
One cycle of “fSYS” is referred to as one state.