zic2410 California Eastern Laboratories, zic2410 Datasheet - Page 19

• Manufacturer Part Number: zic2410
• Description: Single-chip Solution, Compliant With Zigbee
• Manufacturer: California Eastern Laboratories

1.4 CLOCK SOURCE
The ZIC2410 can use either a 16MHz or a 19.2MHz crystal as the system clock source. An
external 32.768 KHz crystal or the internal clock generated from internal the RCOSC is used for
the Sleep Timer clock.
For the internal 8051 MCU Clock in the ZIC2410, either 8MHz or 16MHz can be used. When
selecting the 8051 MCU Clock (8MHz, 16MHz), the CLKDIV0 register should be set as follows.
Please note the crystal oscillator input (XOSCI) can also be driven by a CMOS clock source.
CLKDIV0 (OPERATING FREQUENCY CONTROL REGISTER, 0x22C3)
Bit
7:0
Rev A
CLKDIV0
Name
This register is used to control the clock of the
internal 8051 MCU. When this register is set to
0xFF, the clock is set to 8MHz; when set to 0x00,
the clock is set to 16MHz. All other values except
0xFF and 0x00 are reserved.
Document No. 0005-05-07-00-000
Table 5 – Clock Registers
Descriptions
ZIC2410 Datasheet
R/W
R/W
Reset
Value
0xFF
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