STC micro STC8A8K64D4 Series - Read the Frequency of 32 K Power-Down Wake-Up Timer (Read from CHIPID)

STC8A8K64D4 Series Manual
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MOV TL1,#0E8H ;65536-11059200/115200/4=0FFE8H
MOV TH1,#0FFH
SETB TR1
MOV AUXR,#40H
CLR BUSY
RET
UART_SEND:
JB BUSY,$
SETB BUSY
MOV SBUF,A
RET
MAIN:
MOV SP, #5FH
MOV P0M0, #00H
MOV P0M1, #00H
MOV P1M0, #00H
MOV P1M1, #00H
MOV P2M0, #00H
MOV P2M1, #00H
MOV P3M0, #00H
MOV P3M1, #00H
MOV P4M0, #00H
MOV P4M1, #00H
MOV P5M0, #00H
MOV P5M1, #00H
LCALL UART_INIT
SETB ES
SETB EA
MOV R0,#ID
MOV R1,#7
NEXT: MOV A,@R0
LCALL UART_SEND
INC R0
DJNZ R1,NEXT
LOOP:
JMP LOOP
END
7.5.7 Read the Frequency of 32K Power-down Wake-up Timer (Read from
CHIPID)
C language code
//Operating frequency for test is 11.0592MHz
#include "reg51.h"
#include "intrins.h"
#define FOSC 11059200UL
#define BRT (65536 - FOSC / 115200 / 4)
#define CPUIDBASE 0xfde0