參數(shù)資料
型號: MC68MH360ZQ25LR2
廠商: Freescale Semiconductor
文件頁數(shù): 101/158頁
文件大小: 0K
描述: IC MPU QUICC 25MHZ 357-PBGA
標(biāo)準(zhǔn)包裝: 180
系列: M683xx
處理器類型: M683xx 32-位
速度: 25MHz
電壓: 5V
安裝類型: 表面貼裝
封裝/外殼: 357-BBGA
供應(yīng)商設(shè)備封裝: 357-PBGA(25x25)
包裝: 帶卷 (TR)
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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S
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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