c8051f410 Silicon Laboratories, c8051f410 Datasheet - Page 189
c8051f410
Manufacturer Part Number
c8051f410
Description
2.0 V, 32/16 Kb Flash, Smartclock, 12-bit Adc
Manufacturer
Silicon Laboratories
Datasheet
1.C8051F410.pdf
(270 pages)
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L0: mov A, RTC0ADR
L1: mov A, RTC0ADR
L2: mov A, RTC0ADR
L3: mov A, RTC0ADR
L4: mov A, RTC0ADR
To reduce the number of instructions necessary to read and write sections of the 64-byte RAM, the
RAMADDR register automatically increments after each write or read. The following C example initializes
the entire 64-byte RAM to 0xA5 and copies this value from the RAM to an array using the auto-increment
feature:
// in 'C':
unsigned char RAM_data[64] = 0x00;
unsigned char addr;
// Unlock smaRTClock, enable smaRTClock
// Write to the entire smaRTClock RAM
RTC0ADR = 0x0E;// address the RAMADDR register
RTC0DAT = 0x00;// write the address of 0x00 to RAMADDR
while ((RTC0ADR & 0x80) == 0x80);
RTC0ADR = 0x0F;// address the RAMDATA register
for (addr = 0; addr < 64; addr++)
{
}
// Read from the entire smaRTClock RAM
RTC0ADR = 0x0E;// address the RAMADDR register
RTC0DAT = 0xA5; // write 0xA5 to every RAM address
while ((RTC0ADR & 0x80) == 0x80);// poll on the BUSY bit
; Enable the smaRTClock
mov RTC0ADR, #06h ; address the RTC0CN register
mov RTC0DAT, #080h ; enable the smaRTClock
jb ACC.7, L0
; Write to the smaRTClock RAM
mov RTC0ADR, #0Eh; address the RAMADDR register
mov RTC0DAT, #20h; write the address of 0x20 to RAMADDR
jb ACC.7, L1
mov RTC0ADR, #0Fh; address the RAMDATA register
mov RTC0DAT, #0A5h; write 0xA5 to RAM address 0x20
jb ACC.7, L2
; Read from the smaRTClock RAM
mov RTC0ADR, #0Eh; address the RAMADDR register
mov RTC0DAT, #20h; write the address of 0x20 to RAMADDR
jb ACC.7, L3
mov RTC0ADR, #0Fh
orl RTC0ADR, #80h
jb ACC.7, L4
movR0, #80h
mov@R0, RTC0DAT
; the 128-byte internal RAM
; poll on the BUSY bit
; poll on the BUSY bit
; poll on the BUSY bit
; poll on the BUSY bit
; read the value of RAM address 0x20 into
; poll on the BUSY bit
; address the RAMDATA register
; initiate a read of the RAMDATA register
// poll on the BUSY bit
Rev. 1.0
C8051F410/1/2/3
189
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