參數(shù)資料
型號: uPSD3233
廠商: 意法半導(dǎo)體
英文描述: Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可編程系統(tǒng)器)
中文描述: 閃存可編程系統(tǒng)器件與8032微控制器內(nèi)核(嵌入高速“8032微控制器核”的閃存型可編程系統(tǒng)器)
文件頁數(shù): 76/164頁
文件大小: 1133K
代理商: UPSD3233
μ
PSD3200 FAMILY
76/164
DRAFT(Thursday 20 June 2002, 13:15).
Table 60. SWNEB Bit Function
SWENB
DDC1 or DDC2b Mode Disabled
DDC1 or DDC2b Mode Enabled
DDCCON.bit2 = 0 (DDC1 Mode Disable) or
S1CON.bit6 = 0 (I
2
C Mode Disable)
DDCCON.bit2 = 1 (DDC1 Mode Enable) or
S1CON.bit6 = 1 (I
2
C Mode Enable)
0
In this state, the DDC unit is disabled. The DDC
SRAM cannot be accessed by the MCU. No MCU
interrupt and no DDC activitywill occur.
MCU XRAM: cannot access
In this state, the DDC is enabled and the unit is in
automatic mode. The DDC SRAM cannot be
accessed by the MCU – only the DDC unit has
access. The DDC unit will operate like the
ST24C21 product, as discussed.
MCU XRAM: cannot access
1
In this state, the DDC unit is disabled, BUT with
SWENB=1, the MCU can access the SRAM. This
state is used to load the DDC SRAM with the
correct data for automatic modes. No MCU
interrupt and no DDC activity will occur.
MCU XRAM: FF00h - FFFFh
In this state, the DDC SRAM can be accessed by
the MCU. The DDC unit does not use the DDC
SRAM when SWENB=1. Since the DDC unit is in
manual mode, the DDC unit generates an MCU
interrupt for each byte transferred. The byte
transferred is held in the I
2
C S1DAT SFR register.
MCU XRAM: FF00h - FFFFh
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