參數(shù)資料
型號： MC68MH360AI25VL
廠商： Freescale Semiconductor
文件頁數(shù)： 101/158頁
文件大?。?/td> 0K
描述： IC MPU QUICC 25MHZ 240-FQFP
標(biāo)準(zhǔn)包裝： 24
系列： M683xx
處理器類型： M683xx 32-位
速度： 25MHz
電壓： 3.3V
安裝類型： 表面貼裝
封裝/外殼： 240-BFQFP
供應(yīng)商設(shè)備封裝： 240-FQFP（32x32）
包裝： 托盤
Chapter 2. QMC Memory Organization
2.4.1.2 TSTATE—Tx Internal State (HDLC)
TSTATE denes the internal transmitter state. The high byte of TSTATE denes the
function code/address type and the Motorola/Intel bit. Bit 3 (or bit 28 for the 68360) should
always be set to 1. Figure 2-8 shows the TSTATE register for HDLC operation.
Note: For the 68360, the bit numbering is reversed. See Appendix A for more information.
Figure 2-8. TSTATE—Tx Internal State (HDLC)
For the MH360, TSTATE should be host-initialized to 0x3800_0000 before enabling the
channel—function code 8. Table 2-6 describes the TSTATE elds for the MH360 with
boldfaced parameters to be initialized by the user.
For the 860MH, TSTATE should be host-initialized to 0x3000_0000 before enabling the
channel—AT = 0. Note that for the 860MH, bit 4 should always be zero as only bits 5–7
map to AT[1–3]. Table 2-7 describes the TSTATE elds for the 860MH with boldfaced
parameters to be initialized by the user.
10–11
—
Reserved
12–15
NOF
Number of ags—Denes the minimum number of ags before frames. However, even if
NOF = 0, at least one ag is transmitted before the rst frame. See the description of the IDLM
bit for more information.
01234567
0
1
MOT
FC[3–0]/ AT[1–3]
Table 2-6. TSTATE Field Descriptions for MH360 (HDLC)
Field
Name
Description
0–1
—
0
2—
1
3
MOT
Motorola/Intel bit
0 = The bus format is Intel format (little-endian).
1 = The system bus is considered to be organized in Motorola format (big-endian).
4–7
FC[3–0]
Function code—This eld contains the function code for the transmitter DMA channel for data
buffers in external memory (transmit buffers). Function codes are needed by the memory
controller to decode a correct memory cycle and activate the correct handshaking.
Table 2-5. CHAMR Field Descriptions (HDLC) (Continued)
Field
Name
Description
F
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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