MSM9225GS-2K 查看數據表（PDF） - Oki Electric Industry

零件编号

产品描述 (功能)

生产厂家

MSM9225GS-2K

CAN (Controller Area Network) Controller

Oki Electric Industry 

¡ Semiconductor

MSM9225

(1) Baud rate prescaler: BRP5 to BRP0

This is a 6-bit prescaler to set the BTL cycle time and SJW of the basic clock for

communication operation.

The relationship between the bit content and BTL is as follows:

At reset, BRP5 to BRP0 are set to "000000".

BRP5

0

0

·

·

1

1

BRP4

0

0

·

·

1

1

BRP3

0

0

·

·

1

1

BRP2

0

0

·

·

1

1

BRP1

0

0

·

·

1

1

BRP0

0

1

·

·

0

1

BTL cycle time

1X system clock cycle

2X system clock cycle

·

·

63X system clock cycle

64X system clock cycle

The BTL cycle time is given by the following operation.

BTL cycle time = 2 ¥ (25 ¥ BRP5 + 24 ¥ BRP4 + 23 ¥ BRP3 + 22 ¥ BRP2 + 21 ¥ BRP1 + BRP0

+ 1)/fOSC

*) System clock is 1/2 division of oscillation frequency.

fOSC is the oscillation frequency.

(2) SJW: SJWA, SJWB

This is a 2-bit register to set SJW.

The relationship between bit content and SJW is as follows:

At reset, SJWA and SJWB are set to “00”.

SJWB

0

0

1

1

SJWA

0

1

0

1

SJW1, SJW2

1 ¥ BTL cycle

2 ¥ BTL cycle

3 ¥ BTL cycle

4 ¥ BTL cycle

17/73

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